Bob is doing a quality test on machine bolts. he tested 24 bolts that he randomly picked and found that 5 were defective.

based on bob's results, what is the expected number of bolts that will be defective if he tests 840 bolts?

a. 139
b. 145
c. 175
d. 211

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?