Others Maths Puzzle

Q1. How many number having atmost 6-digits and sum of the digits atmost 6 are possible ??

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Others Other Question

Two canoe riders must be selected from each of the two groups of campers. One group consists of three men and one woman, and the other group consists of two women and one man. What is the probability that two women and two men will be selected?
a) 1/6 b) 1/4 c) 2/7 d) 1/2 Q2. A fair dice is thrown 6 times .
In how many different ways can we get sum of i) 31 ii) 30 ??