probability 3.2e- 3.2f

Question 1

An ordinary coin is thrown 50 times.
Barry says “I am going to get heads 25 times and tails 25 times.” Explain why he could be wrong.

Answer 1

The coin throws are independent. The probability of getting a head each time is
37
12 and the probability of getting a tail each time is 12 but this doesn’t mean you will get exactly 25 of each.

Question 2

Esme takes the bus to university 40 times during a term. The relative frequency of the bus being late is 0.3.
How many times was the bus late?

Answer 2

12 times

Question 3

Leo plants and grows 50 _lowers.
The table shows information about the colours.
(a) Copy and complete the table.( corbet maths)
Altogether, Leo grows 125 _lowers.
(b) How many _lowers would you expect to be yellow?

Answer 3

look on corbet maths(apply question 1)