Question

quizizz worksheets
name
probability
class
total questions: 20
worksheet time: 10mins
date
instructor name: ms. chelsea hubbard

1. a jar contains 2 pink, 6 red, and 4 blue marbles. if you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

a) $\frac{5}{6}$
b) $\frac{1}{3}$
c) $\frac{1}{2}$
d) $\frac{1}{6}$

1. a bag has 3 red marbles, 2 blue and 4 yellow. what is the theoretical probability of pulling a red?

a) $\frac{3}{9}$
b) $\frac{1}{9}$
c) $\frac{3}{10}$
d) $\frac{1}{3}$

1. experimental probability is:

a) what will happen
b) what should happen
c) what i think happens
d) what actually happens

Explanation:

Step1: Calculate total marbles (Q1)

$2 + 6 + 4 = 12$

Step2: Favorable marbles (Q1: red+blue)

$6 + 4 = 10$

Step3: Compute probability (Q1)

$\frac{10}{12} = \frac{5}{6}$

Step4: Calculate total marbles (Q2)

$3 + 2 + 4 = 9$

Step5: Favorable marbles (Q2: red)

$3$

Step6: Compute probability (Q2)

$\frac{3}{9} = \frac{1}{3}$

Step7: Define experimental probability (Q3)

Recall definition of experimental probability.

Answer:

1. a) 5/6
2. d) 1/3
3. d) What actually happens