a Probability is calculated by dividing the number of favorable outcomes by the number of possible outcomes.
B
b What is the number of animals and sea animals in the bin?
C
c Call the number of other stuffed animals in the bin x and write an equation where 3 alligators divided by (x+3) animals equals 5 %.
A
a 70
B
b 2/5
C
c 60
Practice makes perfect
aProbability is calculated by dividing the number of favorable outcomes by the number of possible outcomes.
P=Number of favorable outcomes/Number of possible outcomes
We know that the probability of getting a stuffed giraffe is 25. We also know that the number of giraffes is 28. With this information we can calculate the number of animals x in the bin.
P=Number of favorable outcomes/Number of possible outcomes
c We know that the desired probability of picking an alligator should be 5 % , and that the number of alligators in the bin is 3. To obtain a 5 % probability, which can be written as 0.05, we need to have enough stuffed animals in the bin of another sort. If we call the number of other animals x, we can write an equation.
