Mathematics, 15.07.2020 01:01 stankyweezle
Of the 84 parents who attended a meeting at a school, 35 volunteered to supervise children during the school picnic and 11 volunteered both to supervise children during the picnic and to bring refreshments to the picnic. If the number of parents who volunteered to bring refreshments was 1.5 times the number of parents who neither volunteered to supervise children during the picnic nor volunteered to bring refreshments, how many of the parents volunteered to bring refreshments
Answers: 2
![n(S\cup R)=n(S)+n(R)-n (S\cap R)\\\\n(S\cup R)=n(S)+[1.5(N-n(S\cup R)]-n (S\cap R)\\\\n(S\cup R)=n(S)+1.5N-1.5n(S\cup R)-n (S\cap R)\\\\2.5n(S\cup R)=n(S)+1.5N-n (S\cap R)\\\\2.5n(S\cup R)=35+(1.5\times84)-11\\\\2.5n(S\cup R)=150\\\\n(S\cup R)=\frac{150}{2.5}\\\\n(S\cup R)=60](/tpl/images/0706/5734/e0457.png)
![n (R) = 1.5 \times n (S' \cup R') \\\\n (R) = 1.5 \times [N-n (S \cup R)]\\\\n (R) = 1.5 \times [84-60]\\\\n(R)=16](/tpl/images/0706/5734/74836.png)
Another question on Mathematics
Mathematics, 21.06.2019 13:40
In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.
Answers: 3
Mathematics, 21.06.2019 23:20
Find the value of x in the diagram below. select the best answer from the choices provided
Answers: 1
Mathematics, 22.06.2019 00:30
L|| m if m? 1=125 and m? 7=50 then m? 5= 5 55 75 105 next question ask for turn it in © 2014 glynlyon, inc. all rights reserved. terms of use
Answers: 3
Mathematics, 22.06.2019 01:00
The actual length of side t is 0.045cm. use the scale drawing to find the actual side length of w
Answers: 1
You know the right answer?
Of the 84 parents who attended a meeting at a school, 35 volunteered to supervise children during th...
Questions
Mathematics, 07.12.2020 18:50
Mathematics, 07.12.2020 18:50
Mathematics, 07.12.2020 18:50
Mathematics, 07.12.2020 18:50
English, 07.12.2020 18:50
English, 07.12.2020 18:50
