A math test is worth 100 points and has 30 problems. Each problem is worth either 3 points or 4 points.
How many 4-point problems are there?

How do i change this into an algebraic expression

I think 15

Step-by-step explanation:

15+15=30, so both 3 or 4 point questions have 15 problems each, hope this helped

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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