Question 1

The two-way table shows the classification of students in a mathematics class by gender and dominant hand. A student who is ambidextrous uses both hands equally well.

What is the probability that a randomly selected student in the class is female given that the student is right-handed?

Accepted Answer

$\frac{12}{23}$

Answer

$\frac{23}{30}$

Answer

$\frac{12}{30}$

Answer

$\frac{1}{12}$

Question 2

The two-way table shows the classification of students in a mathematics class by gender and dominant hand. A student who is ambidextrous uses both hands equally well.

One student will be selected at random from the class.

Consider the events:
$X$: the selected student is female
$Y$: the selected student is right-handed

Which statement about events $X$ and $Y$ is true?

Accepted Answer

The events are not independent because the probability of X is not equal
to the probability of X given Y.

Answer

The events are independent because the number of categories for
dominant hand is different from the number of categories for gender.

Answer

The events are independent because the number of right-handed
students in the class is larger than the number of female students.

Answer

The events are not independent because for one of the dominant hand
categories the number of female students is 0.

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