There are 39 students in Ms. Salazar's chemistry class. If Ms. Salazar divides the class into 999 lab groups of 4 or 5 students each, what would be the number of lab groups with 5 students?
Answers
Given:
There are 39 students in Ms. Salazar's chemistry class. Ms. Salazar divides the class into 99 lab groups of 4 or 5 students each.
To find:
What would be the number of lab groups with 5 students?
Solution:
From given, we have,
There are 39 students.
Salazar divides the class into 9 lab groups of 4 or 5 students each.
The number of lab groups with 5 students is,
5 × 7 = 35
5 × 8 = 40
But, the number of students is 39.
Therefore, 7 lab groups with 5 students and 1 lab group with 4 students. (7 × 5 + 1 × 4 = 35 + 4 = 39)
So, the number of lab group with 5 students is 7.
Given : 39 Students in Ms. Salazar's chemistry class . Ms. Salazar divides the class into 9 lab groups of 4 or 5 students each
To find : number of lab groups with 5 students
Solution :
Let Say number of group with 5 Students = G
then number of Group with 4 Students = 9 - G ( as total 9 Lab Group )
Students in G groups of 5 Students = 5G
Students in (9 - G) groups of 4 Students = 4(9 - G) = 36 - 4G
Total Students = 5G + 36 - 4G
= 36 + G
Total Students = 39
=> 36 + G = 39
=> G = 3
number of lab groups with 5 students = 3
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