probability of giving atleast re1 from 4 25 paise coins,2 re1 coins and 3 50 paise coin.

Question

find the correct probability and tell the solution.

Answer 1

There are 9 coins altogether, including 2 re1 coins. The chance of not picking one re1 coin is 7/9 on the first selection and the chance of not picking another on the next selection is 6/8, because one coin has already been picked. Multiply these together: 7/9*6/8=7/12. The chance of picking at least one re1 is 1-7/12=5/12.