The sixth-graders at Judith's school got to visit either the science museum or the history museum. 23 students picked the science museum and 24 students picked the history museum. What is the ratio of the number of sixth-graders who visited the history museum to the number of sixth-graders who visited the science museum?

24 to 23 or 24/23 or 24:23

Step-by-step explanation:

A ratio is a comparison, and it is often written as a fraction.  Since it wants the ratio of those that went to the history museum first, you put 24 first, then it's compared to those that went to the science museum second, so you put 23 second.  Write it as a fraction 24/23.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0