In a row of boys, if A is 10th from the left and B is 9th from the right, and A and B interchange their positions, A becomes 15th from the left. How many boys are there in the row? MCQ with Answer and Explanation
In a row of boys, if A is 10th from the left and B is 9th from the right, and A and B interchange their positions, A becomes 15th from the left. How many boys are there in the row?
A. 23
B. 26
C. 24
D. 25
Answer: Option A
Solution (By JKSSB Mock Tests)
After interchange, A is at B's original position which is 15th from left. Originally B was 9th from right. So total = (position of A after swap from left) + (original position of B from right) - 1 = 15 + 9 - 1 = 23.
Explanation:
mono, chromat, ic or better: monochromatic can form 'mono', 'chromatic' but 'chromatic' uses the letters, or common is 2 or 3: 'mono', 'chrom', 'atic' . Accepted is 3.
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