Its - If someone prefers to study with music, the probability the person is in HS is about 44% and The conditional relative frequency that someone is in high school, given that the person prefers to study without music, is about 0.56.

4 0

2 years ago

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130 students choose to attend one of three after school activities: football, tennis or running. There are 58 boys. 49 students

cestrela7 [59]

Answer: $\dfrac{27}{65}$

Step-by-step explanation:

There are 130 students.

There are 58 boys --> 72 girls

A) 49 chose football: 27 are girls --> 22 are boys

B) 72 girls: 24 chose running, 27 chose football --> 21 girls chose tennis

C) 27 students chose tennis: 21 are girls --> 6 are boys.

D) 58 boys: 22 chose football, 6 chose tennis --> 30 boys chose running.

$\large\boxed{\begin{array}{l|cc||c}&\underline{Boys}&\underline{Girls}&\underline{Total}\\Football&22&27&49\\Tennis&6&21&27\\\underline{Running}&\underline{\quad 30\quad}&\underline{\quad 24\quad}&\underline{\quad 54\quad}\\Total&58&72&130\end{array}}$

Total running = 30 boys + 24 girls = 54

Total students = 130

$\dfrac{\text{Total running}}{\text{Total students}}=\dfrac{54}{130}\quad \rightarrow \large\boxed{\dfrac{27}{65}}$

8 0

2 years ago

A baker puts a chocolate cake in the oven to bake for 30 minutes. Let f(t) = 0.25t2 + 65 be the temperature of the cake t minute

Vlada [557]

Answer:

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Step-by-step explanation:

7 0

2 years ago