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    Cnewsteph75's Avatar
    Cnewsteph75 Posts: 1, Reputation: 1
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    #1

    Jan 24, 2009, 08:05 AM
    Obtaining garde for exact average
    The question is Meaghan has grades of 84,65, and 76 on three social studies test. What grade must she obtain on the next test to have an average of 80 for 4 tests
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #2

    Jan 24, 2009, 08:09 AM

    Questions for you?

    What's the formula for average?

    What's the formula for the average of 4 numbers?

    Plug in and simplify?
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