Question
A protractor is a semi-circle of radius 6.1cm.
Calculate the perimeter of the protractor.
Answer/Explanation
Ans: 31.4 or 31.36 to 31.37
Question
Chico has a bag of sweets.
He takes a sweet from the bag at random.
The table shows the probabilities of taking each flavour of sweet.
| Flavour | Lemon | Lime | Strawberry | Blackcurrant | Orange |
| Probability | 0.15 | 0.22 | 0.18 | 0.24 |
(a) Complete the table.
Answer/Explanation
Ans: [0].21 oe
(b) Find the probability that the sweet is lemon or lime.
Answer/Explanation
Ans: [0].37 oe
Question
Dan either walks or cycles to school.
The probability that he cycles to school is \(\frac{1}{3}\).
(a) Write down the probability that Dan walks to school.
(b) There are 198 days in a school year.
Work out the expected number of days that Dan cycles to school in a school year.
Answer/Explanation
Ans:
(a) \(\frac{2}{3}\) oe
(b) 66 cao
Question
The probability that a sweet made in a factory is the wrong shape is 0.0028 .
One day, the factory makes 25000 sweets.
Calculate the number of sweets that are expected to be the wrong shape.[2]
Answer/Explanation
Ans:
18 70