Question

HELP!!! vlogger who is just starting out made three videos. So far, she has 312 subscribers, who watched one, two, or all three videos. The three videos got a combined total of 740 views. Assuming each subscriber only viewed a particular video once, how many more subscribers watched all three videos than only one video?

Answer 1

116 more people

Explanation:

Let a, b, c signify the numbers of subscribers who watched 1, 2, and 3 videos, respectively. So we can say that:

a +b +c = 312 this means that there are 312 subscribers, total

a +2b +3c = 740 this means that there were 740 total views

Next, deduct the double the first equation from the second.

(a +2b +3c) -2(a +b +c)

= (740) -2(312)

this will give us: c -a = 740 -624 = 116

Therefore, 116 more people watched all three videos than watched one video.

hope this helps