In a row of 40 girls, when Purnima was shifted to her left by 4 places, her number from the left end of the row became 10. What was the position of…

Let Purnima's original position from the left be $P$P.

When Purnima shifts to her left by 4 places, her position number from the left decreases by 4.

Her new position from the left = $P - 4$P−4

Given that her new position from the left is 10:

$$P - 4 = 10$$P−4=10

$$P = 14$$P=14

Purnima's original position from the left end was 14.

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Swati was three places to the right of Purnima's original position.

Being to the right means a higher position number from the left.

Swati's position from the left = $14 + 3 = 17$14+3=17

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Total number of girls in the row = 40

To find position from the right end when position from left is known:

Position from right = Total girls - Position from left + 1

Position from right = $40 - 17 + 1$40−17+1

Position from right = $24$24

Therefore, Swati's position from the right end of the row is 24th.

The answer is Option 3: 24th.