Answer
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A = 9
B = 19
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Explain
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If median are getting from " ( a + b ) ÷ 2 " . So :
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Find b :
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(a + b) ÷ 2 = Median
(17 + b) ÷ 2 = 18
17 + b = 18 × 2
17 + b = 36
b = 36 - 17
b = 19
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In conclusion, the value of b is 19
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Find a :
[tex] \frac{7 + a + 12 + 15 + 17 + 19 + 20 + 22 + 24 + 25}{10} = 17[/tex]
[tex] \frac{161 + a}{10} = 17 \\ [/tex]
[tex]161 + a = 17 \times 10[/tex]
[tex]161 + a = 170[/tex]
[tex]a = 170 - 161[/tex]
[tex]a = 9[/tex]
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In conclusion, the value of a is 9
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