If 9 is subtracted from a number, the result is 5. find the number .

4

Step-by-step explanation:

The number is 4.

Let's replace the unknown number with x and put it into an equation.

9-x= 5

Carry over the 9 to the 5 and make x the subject.

-x= 5-9

-x= -4

-x= -4/-1

x= 4

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

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