Question

Q1. If the arithmetic mean of the following data is 7, then (a+ b) will be

x f

4 a

6 4

4 b

9 5

(A) 4 (B) 2 (C) 3 (D) can not be determined​

Answer 1

Answer:

I don't know but I wish you get answer fast

Answer 2

Step-by-step explanation:

> sum=(2+3+3+8+K+M)=4*6 --> K+M=8. Now, both K and M can not be more than 3 (as given that K ≠ M and thus K=M=4 is out and for other values more than 3 K+M>8), also both K and M can not be less than 3 as in this case K+M<8. Son one of them must be less than or equal to 3 and another more than 3 and in this case two middle numbers will be 3 and 3, which gives median of (3+3)/2=3

Answer: C.