Question

Bill estimates that 20 people will attend the seminar if it does not rain and 12 people will attend if it rains. The weather forecast indicates a 40% chance it will not rain and a 60% change it will rain on the day of the seminar. Determine the expected number of people who willattend the seminar.
12.8
14.6
15.2
18.7

Answer 1

so the mean of 20 and 12

Answer 2

nope. since the probability of rain is not 50%

Answer 3

its 20 and 60

Answer 4

40 and 60 sorry

Answer 5

ohh i see

Answer 6

i get 15.6

Answer 7

It's 15.2. The correct method is:

(0.4 x 20) + (0.6 x 12)

(I don't know why I divided by two the first time lol)

Hope that helps.

Answer 8

thanks

Answer 9

No problem