SHSAT Probability Practice Quiz

Question 1

A bag contains $4$ red and $3$ blue marbles. If one marble is drawn at random, what is the probability that it is blue?

Accepted Answer

$\frac{3}{7}$

Answer

$\frac{4}{7}$

Answer

$\frac{7}{3}$

Answer

$\frac{3}{4}$

Question 2

A bag contains $2$ red, $2$ blue, and $6$ green marbles. If one marble is drawn at random, what is the probability that it is red?

Accepted Answer

$\frac{1}{5}$

Answer

$\frac{2}{8}$

Answer

$\frac{8}{10}$

Answer

$\frac{10}{2}$

Question 3

The spinner below is divided into $8$ equal sectors. If the arrow is spun once, what is the probability that it lands on a sector labeled Yellow?

Accepted Answer

$\frac{3}{8}$

Answer

$\frac{3}{5}$

Answer

$\frac{1}{8}$

Answer

$\frac{5}{8}$

Question 4

A bag contains 7 balls, 1 of which is red. What is the probability of drawing a red ball?

Accepted Answer

1/7

Answer

1/8

Answer

2/7

Answer

1/6

Question 5

A bag contains $8$ red, $7$ blue, and $6$ green marbles. If one marble is drawn at random, what is the probability that it is red?

Accepted Answer

$\frac{8}{21}$

Answer

$\frac{21}{8}$

Answer

$\frac{13}{21}$

Answer

$\frac{8}{13}$

Question 6

The spinner below is divided into $8$ equal sectors. If the arrow is spun once, what is the probability that it lands on a sector labeled Yellow?

Accepted Answer

$\frac{1}{4}$

Answer

$\frac{1}{3}$

Answer

$\frac{3}{4}$

Answer

$\frac{1}{8}$

Question 7

A box contains 5 red pens and 7 black pens. If one pen is drawn, not replaced, and then a second pen is drawn, what is the probability that both pens are black? Give the fraction in simplest form.

Accepted Answer

$\frac{7}{22}$

Answer

$\frac{49}{144}$

Answer

$\frac{42}{132}$

Answer

$\frac{7}{12}$

Question 8

A bag contains $8$ red, $5$ blue, and $6$ green marbles. If one marble is drawn at random, what is the probability that it is blue?

Accepted Answer

$\frac{5}{19}$

Answer

$\frac{5}{14}$

Answer

$\frac{14}{19}$

Answer

$\frac{19}{5}$

Question 9

A bag contains 11 balls, 3 of which are red. What is the probability of drawing a red ball?

Accepted Answer

3/11

Answer

4/11

Answer

3/12

Answer

2/11

Question 10

A bag contains $7$ red, $6$ blue, and $4$ green marbles. If one marble is drawn at random, what is the probability that it is red?

Accepted Answer

$\frac{7}{17}$

Answer

$\frac{17}{7}$

Answer

$\frac{7}{10}$

Answer

$\frac{10}{17}$

Probability Practice Quiz

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