Select the missing numbers from the given alternatives

Solution

The pattern followed is that in the first row, the number in the middle is obtained by adding the other two and dividing the result by 3.

Eg : $$\frac{24+36}{3}=\frac{60}{3}=20$$

and $$\frac{15+18}{3}=\frac{33}{3}=11$$

Similarly, $$\frac{55+x}{3}=40$$

=> $$x=120-55=65$$

=> Ans - (D)

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