Question

Kate recorded the number of emails she sent each day for 30 days. Find, to 2 decimal places, the experimental probability that tomorrow she will send:
a 5 emails
b less than 3 emails.​

Answer 1

Given : Kate recorded the number of emails she sent each day for 30 days.

To Find : the experimental probability that tomorrow she will send:

a 5 emails

b less than 3 emails.​

Solution:

Number of emails    Frequency    cumulative frequency

0                                      2                         2

1                                       5                         7

2                                      9                          16

3                                      5                         21

4                                     4                          25

5                                     4                         29

6                                     1                          30

probability that tomorrow she will send 5 Mails  =  4/30

= 2/15

= 0.13

less than 3 emails.​   = 0 mails + 1 mails + 2 Mails   = 16

probability that tomorrow she will send less than 3 emails  = 16/30

= 8/15

= 0.53

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