13.9 Mother, father and son line up at random for a family picture
E : son on one end, F : father in middle
Total outcomes
Let S be son, M be mother and F be father.
Then we have,
CBSE Class 12 board exams 2025 to have 50% competency-based questions; no change in 10th
CBSE Class 12 board exams 2024 over; expected result date, trends of last 10 years
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