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ale4655 [162]
3 years ago
14

Hannah spent 40% of the money she earned last month. If she spent $50, what was the total amount of money that she earned babysi

tting last month

Mathematics
2 answers:
gavmur [86]3 years ago
8 0
Let, the amount she earned = x
Then, x * 40% = 50
x * 0.40 = 50
x = 50 / 0.40
x = 125

In short, Your Answer would be Option C

Hope this helps!
zaharov [31]3 years ago
4 0
$10 dallor she spend last month
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Blood type AB is the rarest blood type, occurring in only 4% of the population in the United States. In Australia, only 1.5% of
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Answer:

a. X is a binomial random variable with n = 50 and p = 0.04

b. Y is a binomial random variable with n = 40 and p = 0.015

Step-by-step explanation:

Binomial probability distribution

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P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

X: the number of US residents (out of 50) with blood type AB.

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This means that p = 0.04, n = 50

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In Australia, only 1.5% of the population has blood type AB.

This means that p = 0.015, n = 40

Z: the total number of individuals (out of 90) with blood type AB.

Here

n = 90, p = 0.04*\frac{50}{90} + 0.015*\frac{40}{90} = 0.0289

Which of the following is true about the random variables X, Y, and Z?

Options a and b are true, while c is false.

7 0
3 years ago
Class Size
TEA [102]
I would go with C because if you do A then its all new students and thats one view D is the same. C seems like the best choice.
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3 years ago
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