CAPE Pure Mathematics Unit 2 · May/June 2017 · Paper 1 · Question Q38
The letters of the word IRREGULAR are to be arranged in a line. The number of possible arrangements in which the 3 Rs are NOT together is
- (A)
7! - (B)
\frac{9!}{3!} - 7! - (C)
9! - 7! - (D)
9! - 7! \times 3!
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