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In a row of students facing north, Krish is 19th from the extreme left end while Maya is 30th from the extreme right end. When both of them interchange their positions, Krish becomes 36th from the extreme left end. How many students are there in the row?

A66

B63

C65

D62

Answer:

C. 65

Read Explanation:

krish 19th from left maya 30th from right after interchange the position maya become 19th from left krish become 30th from right and also krish is 36th from left so apply the eqn m+n-1 30+36-1=35

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