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If 1/4 of the 7th graders got an A on the test and 2/5 of them got a B, that fraction of the students got an A or B?

Respuesta :

JeanaShupp

Answer: [tex]\dfrac{13}{20}[/tex]

Step-by-step explanation:

Given: Fraction of 7th graders got A = [tex]\dfrac14[/tex]

Fraction of 7th graders got B = [tex]\dfrac25[/tex]

The fraction of the students got an A or B = Fraction of 7th graders got  + Fraction of 7th graders got B

[tex]=\dfrac14+\dfrac25\\\\=\dfrac{5+2(4)}{5\times4}\\\\=\dfrac{5+8}{20}\\\\=\dfrac{13}{20}[/tex]

Hence, the required fraction: [tex]\dfrac{13}{20}[/tex]

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