document.write( "Question 1002622: In a class of 16 students, 13 students took a Math test, 10 students took Science test, and 9 students took both tests.
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Algebra.Com's Answer #619502 by ikleyn(52863)\"\" \"About 
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\n" ); document.write( "In a class of 16 students, 13 students took a Math test, 10 students took Science test, and 9 students took both tests.
\n" ); document.write( "How many students did not take any of the tests?
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\n" ); document.write( "\n" ); document.write( "How many students took the Math test only and didn't took the Science test?
\n" ); document.write( "Their number is 13 - 9 = 4.\r
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\n" ); document.write( "\n" ); document.write( "How many students took the Science test only and didn't took the Math test?
\n" ); document.write( "Their number is 10 - 9 = 1.\r
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\n" ); document.write( "\n" ); document.write( "How many students took at least one, the Math or the Science test?
\n" ); document.write( "Their number is 9 + 4 + 1 = 14.\r
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\n" ); document.write( "\n" ); document.write( "Hence, 16-14 = 2 students didn't take any of the tests.\r
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\n" ); document.write( "\n" ); document.write( "Answer. 2.\r
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