In a purse there are 30 coins, twenty one-rupee and remaining 50-paise coins. Eleven coins are picked simultaneously at random a
nd 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
1 rupee coin probability 20C11 11 coin are picked 30C11 <span>ans should be = 20C11/30C11 = 2/3</span></span> I hope my answer has come to your help. God bless and have a nice day ahead!
multiple 72 by .05 (36) to find 10 percent, then multiple 80 percent by that number(36) then add both numbers together to get total number of members that month
