MyQuestionIcon

1

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

Arithmetic Mean and Range

The number of...

Question

The number of children in $10$ families in a locality are $2, 4, 3, 4, 1, 6, 4, 5, x, 5$ . Find $x$ if the mean number of children in a family is $4$ .

Open in App

Solution

Given mean $= 4$
$∴ \frac{2 + 4 + 3 + 4 + 1 + 6 + 4 + 5 + x + 5}{10} = 4 => \frac{34 + x}{10} = 4 => 34 + x = 40 => x = 6$

Suggest Corrections

thumbs-up

1

Similar questions

Q. The number of children in 10 families of a locality are:
2, 4, 3, 4, 2, 0, 3, 5, 1, 1, 5. Find the mean number of children per family.

Q. The following table gives the number of children of

150

families in a village.

No. of children ( $x$ )	$0$	$1$	$2$	$3$	$4$	$5$
No. of families ( $f$ )	$10$	$21$	$55$	$42$	$15$	$7$

Find the average number of children per family.

Q. The number of families with 2,3,4,5,6 children is given below.
Number of families with 2 children = 4
Number of families with 3 children = 10
Number of families with 4 children = 7
Number of families with 5 children = 8
Number of families with 6 children = 6 .
Draw a table using tally marks for the data.

Q. There 4 children, 5 adults and 2 grandparents in a family. Find the ratio of:
1) Children to grandparents
2) Children to total number of members in the family
3) Adults to children

Q. Two different families A and B are blessed with equal number of children. There are 3 tickests to be distributed amongst the children of these families so that no child gets more than one ticket. If the probability that all the tickets go to the children of the family B is

\frac{1}{12}

, then the number of children in each family is :

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Arithmetic Mean and Range

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Arithmetic Mean and Range

Standard VII Mathematics

Join BYJU'S Learning Program

CrossIcon