The average age of 24 students and the class teacher is 16 years. If the class teacher’s age is excluded, the average reduces by one year. What is the age of the class teacher?
The average age of 24 students and the class teacher is 16 years. If the class teacher’s age is excluded, the average reduces by one year. What is the age of the class teacher?
The average of 10 numbers is 40.2. Later it is found that
two numbers have been wrongly copied. The first is 18
greater than the actual number and the second number added
is 13 instead of 31. Find the correct average.
The average of 10 numbers is 40.2. Later it is found that
two numbers have been wrongly copied. The first is 18
greater than the actual number and the second number added
is 13 instead of 31. Find the correct average.
The mean of 30 values was 150. It was detected on
rechecking that one value 165 was wrongly copied as 135
for the computation of the mean. Find the correct mean.
The mean of 30 values was 150. It was detected on
rechecking that one value 165 was wrongly copied as 135
for the computation of the mean. Find the correct mean.
A library has an average of 510 visitors of Sunday and 240
on other days. The average number of visitors per day in
a month of 30 days beginning with a Sunday is
A library has an average of 510 visitors of Sunday and 240
on other days. The average number of visitors per day in
a month of 30 days beginning with a Sunday is
The average age of Mr. and Mrs Sinha at the time of their marriage in 1972 was 23 years. On the occasion of their anniversary in 1976, they observed that the average age of their family had come down by 4 years compared to their average age at the time of their marriage. This was due to the fact that their son Vicky was born during that period.
What was the age of Vicky in 1980?
The average age of Mr. and Mrs Sinha at the time of their marriage in 1972 was 23 years. On the occasion of their anniversary in 1976, they observed that the average age of their family had come down by 4 years compared to their average age at the time of their marriage. This was due to the fact that their son Vicky was born during that period.
What was the age of Vicky in 1980?
P is going to Delhi from Gurgaon by his car at a speed of
40 km/h. While coming back, he returns with a speed of
x km/h. What should be the value of x so that his average
speed during the intire journey is 80 km/h?
P is going to Delhi from Gurgaon by his car at a speed of
40 km/h. While coming back, he returns with a speed of
x km/h. What should be the value of x so that his average
speed during the intire journey is 80 km/h?
The marks obtained by Hare Rama in Mathematics, English
and Biology are respectively 93 out of 100, 78 out of 150
and 177 out of 200. Find his average score in percent.
The marks obtained by Hare Rama in Mathematics, English
and Biology are respectively 93 out of 100, 78 out of 150
and 177 out of 200. Find his average score in percent.
A person covers half his journey by train at 60 kmph, the
remainder half by bus at 30 kmph and the rest by cycle at
10 kmph. Find his average speed during the entire journey.
A person covers half his journey by train at 60 kmph, the
remainder half by bus at 30 kmph and the rest by cycle at
10 kmph. Find his average speed during the entire journey.
The average temperature for the first four days of a week is
40.2°C and that of the last four days is 41.3°C. If the average
temperature for the whole week is 40.6°C, then the
temperature on the fourth day is
The average temperature for the first four days of a week is
40.2°C and that of the last four days is 41.3°C. If the average
temperature for the whole week is 40.6°C, then the
temperature on the fourth day is
The average of 11 numbers is 10.9. If the average of the
first six numbers is 10.5 and that of the last six numbers is
11.4, then the middle number is :
The average of 11 numbers is 10.9. If the average of the
first six numbers is 10.5 and that of the last six numbers is
11.4, then the middle number is :
The average of 5 consecutive numbers is n. If the next two
numbers are also included the average will
The average of 5 consecutive numbers is n. If the next two
numbers are also included the average will
The average of six numbers is 3.95. The average of two of
them is 3.4, while the average of the other two is 3.85. What is the average of the remaining two numbers?
The average of six numbers is 3.95. The average of two of
them is 3.4, while the average of the other two is 3.85. What is the average of the remaining two numbers?
A school has 4 section of Chemistry in Class X having 40,
35, 45 and 42 students. The mean marks obtained in
Chemistry test are 50, 60, 55 and 45 respectively for the 4
sections. Determine the overall average of marks per student
A school has 4 section of Chemistry in Class X having 40,
35, 45 and 42 students. The mean marks obtained in
Chemistry test are 50, 60, 55 and 45 respectively for the 4
sections. Determine the overall average of marks per student
The average age of 36 students in a group is 14 years. When teacher’s age is included in it, the average increases by one. What is the teacher’s age in years?
The average age of 36 students in a group is 14 years. When teacher’s age is included in it, the average increases by one. What is the teacher’s age in years?
In 1919, W. Rhodes, the Yorkshire cricketer, scored 891
runs for his country at an average of 34.27; in 1920, he
scored 949 runs at an average of 28.75; in 1921, 1329 runs
at an average of 36.70. What was his county batting
average for the four years?
In 1919, W. Rhodes, the Yorkshire cricketer, scored 891
runs for his country at an average of 34.27; in 1920, he
scored 949 runs at an average of 28.75; in 1921, 1329 runs
at an average of 36.70. What was his county batting
average for the four years?