Question

you flip 3 coins 20 times and record the number of heads. the results are listed below. 2, 1, 0, 2, 2, 0, 2, 2, 3, 2, 1, 1, 2, 1, 1, 2, 1, 3, 1 complete the frequency table. number of heads frequency 0 a 1 b 2 c 3 d a = b = c = d = done

Explanation:

Step1: Count 0 - heads frequency

Count the number of 0s in the data set. There are 2 zero - heads results. So $a = 2$.

Step2: Count 1 - heads frequency

Count the number of 1s in the data set. There are 7 one - heads results. So $b = 7$.

Step3: Count 2 - heads frequency

Count the number of 2s in the data set. There are 9 two - heads results. So $c = 9$.

Step4: Count 3 - heads frequency

Count the number of 3s in the data set. There are 2 three - heads results. So $d = 2$.

Answer:

$a = 2$
$b = 7$
$c = 9$
$d = 2$