Question

QUESTION 6

1.    Let’s say in a deal of 5 cards, there is 50% chance of getting a pair of any kind. There is a 26% chance of getting four different suits in the deal. There is a 15% chance of getting a pair AND four different suits. What is the probability that you have no pair?

		a. 61%
		b. 74%
		c. 85%
		d. 50%

10 points   

QUESTION 7

1.    Let’s say in a deal of 5 cards, there is 50% chance of getting a pair of any kind. There is a 26% chance of getting four different suits in the deal. There is a 15% chance of getting a pair AND four different suits. What is the probability that you have a pair OR four different suits?

		a. 61%
		b. 74%
		c. 85%
		d. 50%

10 points   

QUESTION 8

1.    A glass jar contains 1 red, 3 green, 2 blues, and 4 yellow marbles. If a single marble is chosen at random from the jar, what is the probability that it is yellow or green?

-       A.       B.	50%
-       A.       B.	30%

A.	40%
B.	70%

10 points   

QUESTION 9

1.    In a math class of 30 students, 17 are boys and 13 are girls. On a unit test, 4 boys and 5 girls made an A grade. If a student is chosen at random from the class, what is the probability of choosing a girl who got an A grade?

		a. 5/30
		b. 13/30
		c. 17/30
		d. 18/30

10 points   

QUESTION 10

1.    In a math class of 30 students, 17 are boys and 13 are girls. On a unit test, 4 boys and 5 girls made an A grade. If a student is chosen at random from the class, what is the probability of choosing a girl OR an A student?

		a. 5/30
		b. 13/30
		c. 17/30
		d. 18/30

Answer 1

Answer :

6) d. 50% (p(no pair) = 1-p(pair)= 1-50% = 50% )

7) a. 61% (p(pair OR different suit) = p(pair) + p(different suit) - p(different suit and pair) = 50 + 26 -15 = 61)

8) 70% ( Total marbles= 10; yellow + green marbles= 7; %age = 7/10*100)

9) a. 5/30

girls with A grade = 5

total students = 30

P(girl with grade A )= 5/30

10) c. 17/30

total A students = 9

Total girls = 13

Girls with A = 5

girl or A student = 13+9-5= 17

total students = 30

P(required) = 17/30