1 ) There are 36 students in a class and 18 of these students passed their Chemistry test. What percentage of these students passed their test? Round your answer to the nearest
whole number if necessary.

60% of the students passed the test

Step-by-step explanation:

total # of people taking the test: 36

# of people passed: 18

# of people failed: 36-18 = 18 (18 people failed the test)

percentage= (number of favorable outcomes/total number of outcomes)* 100%

(18/36)*100

= 60%

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls