(b) Work out
5 1
6 12

31212

Step-by-step explanation:

612

51

   612

30600

add= 31212

I hope that help you and you understand how to do it at the same time.

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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answer: what is the question you're trying to ask?

step-by-step explanation: