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chun k
chun k asked in Science & MathematicsMathematics · 1 decade ago

Question!!! 10 points!!?

In testing light bulbs, .15% of all bulbs in a factory were found to be defective. In order of 36000 bulbs, how many might be expected to be GOOD?

5 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    35,946

  • SV
    Lv 5
    1 decade ago

    If 15% are expected to be bad, then 85% (=100-15) will be expected to be good.

    So your answer is found by calculating 85% of 36000.

    That's 36000 x 85/100.

    I'll leave it to you continue to the answer itself, if that's OK.

  • Ray
    Lv 5
    1 decade ago

    85 % of the tested bulbs. so .85 x 36000 would give the answer.

  • InterestedEnough
    1 decade ago

    See....percentages are just decimals multiplied by 100.

    first, realize that you are looking for WORKING bulbs, not defective..so you need to find the PERCENTAGE of working bulbs-

    100 - 15 = 85

    So you have -

    36,000 * 85%

    what that actually means is -

    36,000 * 0.85

    30,600 bulbs can be expected to work.

    Source(s): Passed 3rd grade with flying colors
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  • Anonymous
    1 decade ago

    100% total therefore (100-15) or 85% good.

    85% of 36000, or (36000 divided by 100) times 85 to get percentages you need to divide by one hundred and multiply by the percentage you are after

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