MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Mean

Mean weight o...

Question

Mean weight of 21 students of a group is 40 kg. If the mean weight of first 10 students is 42 kg and that of last 10 students is 38 kg, then the weight of 11 the student is

A

20 kg

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

40 kg

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

30 kg

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

None of the above

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B 40 kg
Required weight
$= 21 \times 40 - (10 \times 42 + 10 \times 38) = 40$ Kg.

Suggest Corrections

thumbs-up

0

Similar questions

Q. The mean weight of 21 students is 21 kg. If a student weighing 21 kg is removed from the group,
then the mean of of the remaining students is

(a) 20 kg (b) 21 kg (c) 19 kg (d) 18 kg

Q. The mean weight of

20

25

kg and the mean weight of another

10

40

kg. Find the mean weight of the

30

Q. The mean weight of students in a group of seven is 55 kg. If the individual weights of 6 students are 52, 58, 55, 53, 56 and 54; then the weight of the seventh student is:

Q. In a group of students, the mean weight of boys is

65

kg. and mean weight of girls is

55

kg. If the mean weight of all students of group is

61

kg, then the ratio of the number of boys and girls in the group is

Q. Let mean of weight of

10

235

kgs, if weight of each student increase

3

kgs , than their new mean in kgs is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Central Tendency

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Standard IX Mathematics

Join BYJU'S Learning Program

CrossIcon