Answer:
180
Step-by-step explanation:
78+67+35 all added together make 180. Hope it helps!
Answer:
I'm not 100% if its right but I think its 4:2.
Step-by-step explanation:
Answer:

Multiple across equal sign (Denominator x Nominator and vise versa)




Answer: C. 
Step-by-step explanation:
Given: Box contains 8 green balls and 4 purple balls.
Total balls = 8+4 = 12
event 1 = first picking green ball
event 2 = second picking purple balls.
As first ball was replaced, that means both events are independent.
Probability that you have selected a green ball and then a purple ball = P(purple ball )
Formula for probability = 
Probability of selecting a purple ball (second pick)= 

The required probability
, so C is correct option.
The answer would be C because they say if 3 new students arrived each year.