Please help me please and explain

Lower Quartile Explanation: Arrange the terms in ascending order

20, 22, 25, 28, 29, 30, 32, 33, 34

Take the lower half of the ascending set: 20, 22, 25, 28

Find the median of 20, 22, 25, 28: 23.5

Upper Quartile Explanation: Arrange the terms in ascending order

20, 22, 25, 28, 29, 30, 32, 33, 34

Take the upper half of the ascending set: 30, 32, 33, 34

Find the median of 30, 32, 33, 34: 32.5

Interquartile Explanation:

Compute the first quartile of the list: 23.5

Compute the third quartile of the list: 32.5

Compute the difference between 32.5 and 23.5: 9

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

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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