exam Maths Puzzle Numerical Ability

Problem: Find the number of permutations of the first 8 letters of the alphebet for each situation.

25. taking 5 letters at a time

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exam Other Question

Could you please help me with solving this?

Without writing them down what are the number of subsets of the set A = {a, b, c, d, e, f}? Of set B = {a, b, c, d, e, f, g, h, i, j}? The length of a rectangle is 6 cm less than three times its width. If the area is 24 cm squared, find the length and width.

and

The length of a rectangle is 16 cm less than f