Simplify the expression 6ab + 3ab - 7ab. what is the coefficient of the simplified expression?
a. a
b. ab
c. 2
d. b

(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

If 20% of a number is 35, what is 50% of that number?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?