1. In a school 20 students gave gift to each other, then find the total number of gifts. 2. In how many ways at least 6 players can be selected from a group of 8 players. 3. In how many ways Ramesh can invite 6 friends out of his 15 friends for a dinner. 4. In how...
(Q). A work can be compelted by 5 men or 7 women in 4 days. In how many ways labour force can be selected if work has to be finished in 4 days & available labour force is 12 men & 10 women? If labour force has only men or only...
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