1.

If there are four numbers such that average of A and B is 29, average of B and C is 34 and average of C and D is 50, then what will be the average of A and D?1). 342). 353). 444). 45

Answer»

A + B = 2 × 29 = 58----(1)

B + C = 2 × 34 = 68----(2)

C + D = 2 × 50 = 100----(3)

Adding all these three EQUATIONS, we get

A + 2B + 2C + D = 226

⇒ A + D = 226 – 2 × 68

⇒ A + D = 226 – 136

⇒ A + D = 90

So, average of A + D = 90/2 = 45


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