100 PTS AND BRAINLIEST A survey of high school students determined whether they used​ Instagam, Twtter, or Facbook.
67 used Instagam.
51 used Twtter.
76 used Facbook.
29 used Instagam and Twtter.
43 used Instagam and Facbook.
36 used Twtter and Facbook.
20 had all three features.
Complete parts ​a) through ​e).
​a) How many of the students surveyed used only​ Instagam?
​b) How many of the students surveyed used Instagam and Twtter but not​ Facbook?
​c) How many of the students surveyed used Instagam or​ Twtter?
​d) How many of the students surveyed used Instagam or Twtter but not​ Facbook?
​e) How many of the students surveyed used exactly two of the social​ medias?

a) How many of the students surveyed used only​ Insta gram?

35-21=14

42-21=21

70-14-21-21=14

​b) How many of the students surveyed used Instagr am and​ Twi tter, but not​ Face book?

35-21=14

​c) How many of the students surveyed used Insta gram or​ Twi tter?

38-21=17

62-21-17-14=10

69-21-21-17=10(not in addition portion)

14+14+21+21+17+10=97(answer to c)

d) How many of the students used Instag ram or​ Tw itter, but not​ Face book?

14+14+10=38

​e) How many of the students surveyed used exactly two of the social​ media?

14+21+17=52

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true

your answer is

a.

5

step-by-step explanation: