Q. 283.7( 3 Votes )

# The mean of 2, 7,

Answer :

Given: mean of 2, 7, 6 and x is 15

Mean = 15 = 60 = 15 + x

x = 60 – 15 = 45 …(i)

Also, given that mean of 18, 1, 6, x and y is 10

10 = [ mean = 10]

50 = 25 + 45 + y = 70 + y [from equation (i)]

y = 50 – 70 = - 20

Thus, y = - 20

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