document.write( "Question 440574: In a certain college, 33% of the physics majors belong to ethnic minorities. Find the probability that 7 or more belong to an ethnic minority from a random sample of 10 students who are physics majors. \n" ); document.write( "

Algebra.Com's Answer #304354 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "In a certain college, 33% of the physics majors belong to ethnic minorities. 
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document.write( "Find the probability that 7 or more belong to an ethnic minority from a random
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document.write( " sample of 10 students who are physics majors.
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document.write( "Note: The probability of x successes in n trials is: 
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document.write( "P = nCx*  where p and q are the probabilities of success and failure respectively. 
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document.write( "In this case p = .33 and q = .67  and n = 10
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document.write( " nCx = 
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document.write( "P(7 or more are physics majors) = .0185
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document.write( "10C7(.33)^7(.67)^3 +10C8(.33)^8(.67)^2 +10C9(.33)^9(.67)^1 +10C10(.33)^10
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document.write( "    .0154          +  .0028            + .0003             + .000015  = .0185 \n" );
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