In a row of thirty boys, R is fourth from the right end and W is tenth from the left end . How many boys are there between R and W?

15
16
17
can't be determined

Correct Answer: 16

Explanation:

W = 10th from the left

R = 4th from the right = (30 - 4 + 1= ) 27th from left

No of boys between R and W = (27 - 10) - 1 = 16

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