Rajon's average on four tests is 80. What does he need on his fifth test to raise his average to 84?.
ক. 84
খ. 92
গ. 96
ঘ. 100
উত্তর: 100
ব্যাখ্যা: For Rajon's average on five tests to be 84, he needs a total of 5 ' 84 = 420 points. So far, he has earned 4 ' 80 = 320 points. Therefore, he needs a grade of 100 points on the fifth test.
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Rajon's average on four tests is 80. What does he need on his fifth test to raise his average to 84?.
- ক.84
- খ.92
- গ.96
- ঘ.100
উত্তর