Simple Probability ( 0580 -Core + Extended)

Celine buys a bag of 24 tulip bulbs.

There are 8 red bulbs and 5 white bulbs.

All of the other bulbs are yellow.

Celine chooses a bulb at random from the bag.

Write down the probability that the bulb is red or white.

• $\frac{8}{24}$

• $\frac{13}{24}$

• $\frac{11}{24}$

Celine buys a bag of 24 tulip bulbs.

There are 8 red bulbs and 5 white bulbs.

All of the other bulbs are yellow.

Celine chooses a bulb at random from the bag.

Write down the probability that the bulb is yellow.

• $\frac{8}{24}$

• $\frac{13}{24}$

• $\frac{11}{24}$

The probability that FC Victoria wins the cup is 0.18 .

Work out the probability that they do not win the cup.

(a)  

After training, the shirts are washed.

There are 5 red, 3 blue and 6 green shirts.

One shirt is taken from the washing machine at random.

Find the probability that it is

(i) red, (ii) blue or green (iii) white

• 
  

  $\left(i\right)\ \frac{5}{14}\ \ \left(ii\right)\ \frac{9}{14}\ \ \left(iii\right)\ 0$
  

• $\left(i\right)\ \frac{5}{8}\ \ \ \left(ii\right)\ \frac{9}{14}\ \ \ \left(iii\right)\ 0$ 0

• $\left(i\right)\ \frac{5}{14}\ \ \left(ii\right)\ \frac{9}{14}\ \ \left(iii\right)\ 1$

Zingon make light bulbs.
The probability that a Zingon light bulb is faulty is  $\frac{1}{20}$  .
Gina tests 240 of these light bulbs.How many of them would she expect to be faulty?

• 12

• 22

• 21

Colin has some seeds.

The probability a seed will grow is 0.85 .

Find the probability that a seed will not grow.

• 0.2

• 0.1

• 0.15

85% of the seeds in a packet will produce red flowers.

One seed is chosen at random.

What is the probability that it will not produce a red flower?

• $15\%$

• $15$

• $0.85\%$

In a group of 35 students, 14 go to school by bus.

Write down the probability that a student, chosen at random, does not go to school by bus.

Give your answer as a fraction in its lowest terms.

• $\frac{3}{5}$

• $\frac{21}{35}$

• $\frac{2}{5}$

Write down the relative frequency of the spinner stopping on blue.

• $\frac{8}{25}$

• $\frac{17}{75}$

• $\frac{14}{75}$

Tony spins the same spinner 450 times.

Find the expected number of times the spinner stops on yellow.

• $\frac{14}{75}$

• $84$

• $102$