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3 years ago

9

The admission fee at an amusement park is $2.00 for children and $5.60 for adults. On a certain day, 352 people entered the park

, and the admission fees collected totaled 1280 dollars. How many children and how many adults were admitted?

1 answer:

mixas84 [53]3 years ago

8 0

160 adult tickets and 192 children tickets. 1280=5.60x+2.00y, 352=x+y. Then I solved by substitution.

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2 years ago

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Step-by-step explanation:

If our random variable of interest for this case is X="the number of teenagers between 12-17 with smartphone" we can model the variable with this distribution:

$X \sim Binom(n=234, p=0.75)$

And the mean for this case would be:

$E(X) =np = 234*0.75= 175.5$

And the standard deviation would be given by:

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3 years ago