document.write( "Question 371790: What is the probability that the number of heads will be less than or equal to 1200 out of 2500 tosses?\r
\n" ); document.write( "\n" ); document.write( "P{H<= 1200 when you toss a coin 2500 times}\r
\n" ); document.write( "\n" ); document.write( "define X_k ={5 if H; 10 if H <---- should be on next line in braket\r
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\n" ); document.write( "\n" ); document.write( "Please show me how to solve this. I have been working on it for over a week and cant seem to figure it out.\r
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Algebra.Com's Answer #264865 by robertb(5830) $\"\"$ $\"About$

You can put this solution on YOUR website!
Use the normal approximation for the binomial distribution with $\"mu+=+np+=+2500%2A0.50+=+1250\"$ , and $\"sigma%5E2+=+npq+=+625\"$ , so that $\"sigma+=+25\"$ . Then $\"P%28%28H+-+1250%29%2F25%3C=%281200+-+1250%29%2F25+=+-2+%29+=+P%28Z%3C=-2%29+=+0.0228\"$ . \n" ); document.write( "

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