Question

A survey was conducted among 100 students of age groups 7–12 years and 13–18 years to find their favorite book genre. The students had to select any one genre out of detective, adventure, and biography. Out of the 50 students in the age group 7–12 years who participated in the survey, 23 liked adventure or biography. The total number of students of both age groups who liked detective books was 28.

Using a two-way table, compute the total number of students in the age group 13–18 years who liked adventure or biography.

23
27
49
51

Answer 1

@phi

Answer 2

I think B or C

Answer 3

this is almost like a (simple ) puzzle.

they want you to make a table

7-12 13-18
detective
other 23
----------------------
50 50
(50 students in each age group)

Answer 4

how many in the first age group (7-12) like detective?
any idea ?

Answer 5

28

Answer 6

27, because 27+23= 50

Answer 7

7-12 13-18
detective 27 ?? <----- this row adds up to 28. how many in 13-18 ?
other 23
----------------------
50 50
total number of students of both age groups who liked detective books was 28.

Answer 8

1

Answer 9

7-12 13-18
detective 27 1
other 23 ?? <--- how many here? (column adds up to 50)
----------------------
50 50

Answer 10

27

Answer 11

we now the number of students in 13-18 is 50
1 of them likes detective
how many like the other genres ?

Answer 12

2

Answer 13

you are lost? But where did you lose the bubble ?

Answer 14

you said how many other genres. So adventure and biography

Answer 15

oh that equals 1

Answer 16

how many students in the 13-18 group like adventure and bio ?

Answer 17

so the answer is 49

Answer 18

yes, 49

Answer 19

thank you!!!!

Answer 20

7-12 13-18
detective 27 1
other 23 49
----------------------
50 50

Answer 21

how did you become so good at math?

Answer 22

how do you get good at dancing ?

Answer 23

haha... practice