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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
4.50 Sets Word Problems

Example:
In an elementary school, students know atleast one of the languages, French and Spanish. 125 students know French, 75 students know Spanish and 50 of them know both French and Spanish. How many students are there in the school?
Solution:
Venn Diagram:

Let:
n(F) = number of students who know French
n(S) = number of students who know Spanish
Here
n(F) = 125, n(S) = 78, n(F n S) = 50
We have to find n(F u S)
We know that n(F u S) = n(F) + n(S) - n(F n S)
= 125 + 75 - 50
= 150

Directions: Solve the following problems. Also write at least five examples of your own.
Q 1: There are 64 persons in a group. Each of them eats either apple or plantain or both. Those who eat apples are 36 in number. The number those who eat both apples and plantain is 21. How many eat plantains only?
28
25
43

Q 2: In a group, members know atleast one of the languages, French and Spanish. 125 members know French, 75 members know Spanish and 50 of them know both French and Spanish. How many members are there in the group?
150
100
160

Q 3: In a class 50 can speak either English or Spanish or both. If 35 students can speak English and 25 can speak both; find the number of those who speak Spanish only.
15
25
20

Q 4: A survey shows that 71% of Americans like to watch Baseball, whereas 64% like to watch Ice-hockey. What percentage of Americans like to watch both Baseball and Ice-hockey?
58%
45%
35%

Q 5: In a group of 80 persons, 30 drink Coke but not Pepsi and 41 drink Coke. How many drink Pepsi, but not Coke?
45
39
24

Q 6: At dinner, seven people ordered the special of the day. Three people order from the list of the menu, one person orders only salad. Find the number 'm' (dinners ordered by the people).
20
10
30

Q 7: In a group of 80 persons, 30 drink Coke but not Pepsi and 41 drink Coke. How many drink Coke and Pepsi both?
11
7
12

Q 8: In a group of 50, 20 like tea while 21 like coffee. There is none who dislike both. How many persons like both coffee and tea?
11
9
10

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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