Mathematics
Mathematics, 05.02.2020 11:47, victoria6929

In a purse there are 30 coins, twenty one-rupee and remaining 50-paise coins. eleven coins are picked simultaneously at random and are placed in a box. if a coin is now picked from the box, find the probability of it being a rupee coin?
option 1 : 4/7 option 2 : 1/2 option 3 : 2/3 option 4 : 5/6

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