Many bank accounts never go below zero. But some banks will allow a negative balance, at least for a short time, called an overd
raft. It means someone has taken out, or 'drafted', more money than was in the account to begin with. Jason's account has gone into overdraft. His balance is $-48.82. To get back to a positive balance, he plans to deposit money at a steady rate of $28.55 per week. How much will be in his account after 3 weeks?
We know that The formula for combinations is C=n!/[(n-r)!*r!] where n is the total number of objects you choose from r is the number that you choose to arrange
in this problem n=15 students r=4 students C=15!/[(15-4)!*4!]-----> C=15!/[11!*4!]---> (15*14*13*12*11!)/(11!*4*3*2*1) C=(15*14*13*12)/(24)----->C=1365
if you add 55% and 45% the total is 100% so 45/100 are girls. 35% of the girls scored and A so 35/45 is the probability that it is a girl chosen or 7/9. the probability is 7 out of 9.