Question

the mean of 1,3,4,4,5,7 is x and that of 3,2,4,2,3,3,y is (x-1) whereas medians of the second group is z . find the mean of y and z​

Answer 1

Answer:

(i) Mean of 1,7,5,3,4,4 is m.

Here n=6

Mean, m=(1+7+5+3+4+4)/6

m=24/6

m=4

Given the numbers 3,2,4,2,3,3,p have mean m−1.

So m−1=(3+2+4+2+3+3+p)/7

4−1=(17+p)/7

3=(17+p)/7

3×7=17+p

21=17+p

p=21−17

p=4

Hence the value of p is 4.

(ii) Given the numbers have median q.

Arranging them in ascending order

2,2,3,3,3,4,4

Here n=7 which is odd

So median=((n+1)/2)

th

term

q=((7+1)/2)

th

term

q=(8/2)

th

term

q=4

th

term

q=3

So value of q is 3.

(iii) mean of p and q=(p+q)/2

=(4+3)/2

=7/2

=3.5

Hence the mean of p and q is 3.5

Answer 2

Step-by-step explanation:

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