(B) Initially,Rita is $9^{th}$ from the right and Monika is $10^{th}$ from the left.After interchanging,Rita is $17^{th}$ from the right and Monika is

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(B) Initially,Rita is $9^{th}$ from the right and Monika is $10^{th}$ from the left.After interchanging,Rita is $17^{th}$ from the right and Monika is $18^{th}$ from the left.Since Rita takes Monika's original position,her new position from the right $(17^{th})$ corresponds to Monika's original position from the left $(10^{th})$.Total number of girls = (Position from left + Position from right - $1$) = $(10 + 17 - 1) = 26$.Alternatively,using Monika's new position: Total = $(18 + 9 - 1) = 26$.

Competitive Reasoning Number, Ranking and Time Sequence Test Number, Ranking and Time Sequence Test

Medium

In a row of girls,Rita and Monika occupy the ninth place from the right end and tenth place from the left end,respectively. If they interchange their places,Rita and Monika occupy seventeenth place from the right and eighteenth place from the left,respectively. How many girls are there in the row?

A
$25$
B
$26$
C
$27$
D
Data inadequate

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In a row of girls,Rita and Monika occupy the ninth place from the right end and tenth place from the left end,respectively. If they interchange their places,Rita and Monika occupy seventeenth place from the right and eighteenth place from the left,respectively. How many girls are there in the row?

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The Managing Director entered the conference room $10 \, \text{minutes}$ before $12:30 \, \text{hours}$ for interviewing. He came $20 \, \text{minutes}$ before the chairman who was $30 \, \text{minutes}$ late. At what time was the interview scheduled?

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