Ten students sit together. (a) In how many ways can they sit if they sit in a row? (b) In how many ways can they sit if they sit in two rows with five seats each?
Q. Ten students sit together. (a) In how many ways can they sit if they sit in a row? (b) In how many ways can they sit if they sit in two rows with five seats each?
Calculate Ways in a Row: Calculate the number of ways to arrange ten students in a row.Using the formula for permutations, n!, where n is the number of students:10!=10×9×8×7×6×5×4×3×2×1=3628800
Calculate Ways in Two Rows: Calculate the number of ways to arrange ten students in two rows of five each.First, choose 5 students for the first row (combination), then arrange them (permutation). Repeat for the second row.Number of ways = (5)×5!×5!(10)= (10!/(5!×5!))×5!×5!= 10!/5!=30240
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