Practice Test Discussion

Q)

Of the three numbers, the average of the first and the second is greater than the average of the second and the third by 15. What is the difference between the first and the third of the three numbers?

[SBI, 2000]

    • Explanation

    Let three numbers be x,y and z.

    According to the question,

    =x+y2-y+z2=15

    = x+y-y-z=30

    = x-z=30

    Hence, Option E is correct.

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