The ratio of counselors to campers at a camp is 1 : 9. the ratio of campers who can swim to campers who cannot swim is 7 : 2. there are 13 counselors. how many campers can swim?

91 campers can swim

Step-by-step explanation:

step 1

Find the number of campers

we know that

The ratio of counselors to campers at a camp is 1 : 9

so

by proportion

Find the number of campers if there are 13 counselors

Let

x> the number of campers

1/9=13/x

x=9*13=117 campers

step 2

How many campers can swim?

we know that

The ratio of campers who can swim to campers who cannot swim is 7 : 2

so

The ratio of total campers  to campers who can swim is 9 : 7

by proportion

Find how many campers can swim for a total of 117 campers

Let

x> the number of campers that can swim

9/7=117/x

x=117*7/9

x=91 campers can swim

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.