Answer:
30
Step-by-step explanation:
boys: girls : total
3 7 3+7 =10
The total number of students must be a multiple of 10
The class size is between 22 and 34
The only multiple of 10 between those numbers is 30
10,20,<u>30</u>,40
Therefor the class size must be 30
The inequality is true only when x=-7/4
Answer:
15/64
Step-by-step explanation:
Given
Red, R : 3 marbles
Blue, B : 5 marbles
Total : 5+3=8 marbles
If first marble is returned
P(Red) = 3/8
P(Blue) = 5/8
P (Red then Blue) = 3/8 x 5/8 = 15/64
