Question

Please answer me fast question 9

Answer 1

Let third observation be x .

(a+x )/3 = 14

=> a + x = 42....(i)

(b+x)/3 = 17

=> b + x = 51....(ii)

From (i) and (ii) ,

a+x + b+x = 42 + 51

=> a+2x+b = 93 ....(iii)

(a+x+b)/5 = 15

=> a+x+b = 75 ....(iv)

From (iii) and (iv) ,

=> a+2x+b - (a+x+b) = 93 - 75

=> x = 18 Ans.

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Answer 2

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x = 18