4 numbers are in the ratio 2:3:5:7 and their average is 51. Find the largest number among them.

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Solution

The correct option is B 84
Let the numbers be 2x, 3x, 5x and 7x.
Average $= \frac{sum}{number} = \frac{2 x + 3 x + 5 x + 7 x}{4} = 51 \frac{17 x}{4} = 51 So x = 3 \times 4 = 12 The largest number = 12 \times 7 = 84$

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Similar questions

Q. 4 numbers are in the ratio $2 : 3 : 5 : 7$ and their average is 51.Find the largest number among them.

Q. 4 संख्याएँ $2 : 3 : 5 : 7$ के अनुपात में हैं और उनका औसत 51 है।उनमें से सबसे बड़ी संख्या ज्ञात करें।

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3 x + 4 y : 8 x + 5 y

x : y = 8 : 9

(7 x - 4 y) : 3 x + 2 y

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