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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 |
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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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