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N76 [4]
2 years ago
9

The minimum mark to obtain a Grade A is 75. Cheryn managed to achieve an average of Grade A for three of her English quizzes. Wh

at is the minimum mark she scored in her first quiz if scored 76 and 89 marks in her second and third quiz, respectively?​
Mathematics
1 answer:
Masteriza [31]2 years ago
4 0

9514 1404 393

Answer:

  60

Step-by-step explanation:

Let m represent the mark Cheryn scored on her first quiz. Then her average is ...

  (m +76 +89)/3 ≥ 75

  m +165 ≥ 225 . . . . . . . . multiply by 3

  m ≥ 60 . . . . . . . . . . . . subtract 165

Cheryn scored a minimum of 60 marks on her first quiz.

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