3a. Ten percent of a high school class participated in a
Maths Olympiad and 95% of the senior that took part
in the Maths Olympiad got into universities of their
choice. Only 50% of the seniors who didn't participate
get into the universities of their choice. What
percentage of the senior from the high school got
admitted into the universities of their choice?

Arestaurant needs to buy thirty-seven new plates. if each box has five plates in it, how many boxes will they need to buy?

Icould really use some with this question.

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.