Binomial Distribution or Not

In one report, 54% of Malaysians buy locally made cars. If 8 peoples who just bought new cars are selected at random, find the probability that (a) at least 2 of them bought locally made cars, (b) more than 6 of them bought locally made cars.

• 0.9792; 0.05650

• 0.8192; 0.15650

• 0.8792; 0.25650

• 0.9192; 0.15650

Bob is taking a 100 question test. They have a 90 % probability of getting any one question correct. WHICH IS THE CORRECT FORMULA TO FIND OUT THE PROBABILITY that they will answer EXACTLY 70 questions correctly?

What does the n stand for in the binomial probability formula?

• Number of trials

• Number of Successes

• Probability of Successes

• Probability of Failures

X ~ B(20, 0.5)

Find P(X = 7)

• 0.07

• 0.13

• 0.87

• 0.94

X ~ B(20, 0.5)

Find P(X ≥ 7)

• 0.07

• 0.13

• 0.87

• 0.94

X ~ B(20, 0.5)

Find P(X ≤ 7)

• 0.07

• 0.13

• 0.87

• 0.94

X ~ B(30, 0.9)

Find P(X ≥ 25)

• 0.10

• 0.18

• 0.82

• 0.93

X ~ B(18, 0.3)

Find P(X ≥ 5)

• 0.20

• 0.53

• 0.47

• 0.67

If you were to flip a coin 20 times, what is the probability you would get at least 13 heads?

• .9423

• .1316

• .0577

• .0739

A fair three-sided spinner has sectors labelled 1,2,3. The spinner is spun until a 3 is scored. The number of spins required to get a 3 is denoted by X. Is this Binomial Distribution question?

• Yes

• No