Question

The mean of five number is 50 out of which mean of 4 number is 46 find the fifth number

Answer 1

Let numbers be x1,x2,x3,x4 and x5

We are given, (x1 + x2 + x3 + x4)/4 = 46
                = x1+ x2 + x3 + x4 = 184 .........(1)

and, x1+ x2 + x3 + x4 + x5 = 50*5 = 250 ........................(2)

so, fifth number ,x5 = 250 - 184
                                  = 66