Maths-

General

Easy

Question

# Let m denote the number of four digit numbers such that the left most digit is odd, the second digit is even and all four digits are different and n denotes the number of four digit numbers such that the left most digit is even, an odd second digit and all four different digits. If m = nk then the value of k equals

## The correct answer is:

### m = 5.5.8.7

= 1400

n = 1400 - (587)

= 1400- 280 = 1120

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