Answer:
1 hour 20 minutes
Step-by-step explanation:
The play started at 2:35 PM.
After the play, Jamie talked to her friend for 15 mins and then left the theater at 4:10 PM.
She started talking to her friend once the play was over, hence, to find the time she started talking, we subtract 15 mins from 4:10 PM:
H M
04 : 10
- <u>00 : 15</u>
<u>03 : 55</u>
She started talking around 3:55 PM.
Hence, to find how long the play lasted:
H M
03 : 55
- <u>02 : 35</u>
<u>01 : 20</u>
Hence, the play lasted for 1 hour 20 minutes.
<span>Number of values = 5 (There are 5 values given)
Mean = (82 + 44 + 67 + 52 + 120)/5 = 73
Variance = (1/5) [(82-73)^2 + (44-73)^2 + (67-73)^2 + (52-73)^2 + (120-73)^2] = 721.6
Standard deviation = sqrt (721.6) = 26.86</span>
<span>To find the average we need to sum the number of people in all the concert and divide it by the number of concert.
Average = (935+1100+1100) / 3
= 3135 / 3
Average number of people in the three concerts = 1045 people</span>
