In a group of x children, 10 like Maths and 25 like English. 7 like both subjects and 17 like neither. How many children are there in the group?
2007-05-23 07:59:02 · 28 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
It's 10 + 25 - 7 + 17, which is 45.
You add up those who like Math and those who like English, then subtract those who like both because they have been counted twice. Then add in the number who like neither.
2007-05-23 08:04:57 · answer #1 · answered by McFate 7 · 0⤊ 0⤋
10 + 25 - 7 + 17 = 45
2007-05-23 08:06:42 · answer #2 · answered by Anonymous · 1⤊ 0⤋
45.
Start by drawing a Venn diagram of 2 interlinking circles within a rectangle (the Universal set).
One circle represents the Maths set and the other the English set.
The intersection of the two circles would be 7 (7 like both subjects).
The area outside both circles would be 17 (17 like neither).
Since 10 like Maths, the cresent for Maths only would be 10-7=3.
Since 25 like English, the cresent for English only would be 25-7=18
Adding the numbers; 3+7+18+17 = 45.
2007-05-25 12:55:26 · answer #3 · answered by Kemmy 6 · 1⤊ 0⤋
M = like maths only.
E = like English only.
B = like both.
M + B = 10.
M + (7) = 10.
M = 3.
E + B = 25.
E + (7) = 25.
E = 18.
The total is M + E + B + N
= 3 + 18 + 7 + 17
= 45.
2007-05-23 08:03:40 · answer #4 · answered by Louise 5 · 5⤊ 0⤋
45
2007-05-27 05:14:23 · answer #5 · answered by josemontes4u 1 · 0⤊ 0⤋
10 = maths
25 = english
7 = both
17 = neither
for maths = 10-7 = 3
for english = 25-7 = 18
so......
3+7+18+17 = 45
2007-05-24 10:23:23 · answer #6 · answered by Nutr 1 1 · 0⤊ 0⤋
45
2007-05-23 08:48:13 · answer #7 · answered by Anonymous · 0⤊ 0⤋
45
2007-05-23 08:12:24 · answer #8 · answered by Quizard 7 · 0⤊ 0⤋
45
2007-05-23 08:10:20 · answer #9 · answered by Debs 3 · 0⤊ 0⤋
45
2007-05-23 08:07:19 · answer #10 · answered by Anonymous · 0⤊ 0⤋