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math

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If you earn the grades of 81, 84, 78, 80 in four tests what should your final test’s score be in order to have an average of 81%?

.81x400=324
Need a total of 324 pts
Test grades so far 81,84,78,80 = 323
324-323=1
You need at least one more point to get an 81

Can someone please check my problem to see if it is correct if not please guide me thank you

  • math - ,

    Isn't your final grade figured on five tests?

    0.81 * 500 = 405

    405 - 323 = 82

  • math - ,

    ok so instead of .81 x 400 it's 500? because it is 5 tests?

  • math - ,

    Right.

  • math - ,

    ok thank you

  • math - ,

    You're welcome.

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