Your grocery bill before taxes was $265.24. You have to pay 7.3% sales tax. How much is your total grocery bill?

Can someone check my answer? you

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?