document.write( "Question 668436: a study indicates that 4% of american teenagers have tattoos. if you randomly sample 30 teenagers what is the probability at most 3 teenagers will have tattoos? \n" ); document.write( "
Algebra.Com's Answer #415567 by Edwin McCravy(20055)\"\" \"About 
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a study indicates that 4% of american teenagers have tattoos. if you randomly sample 30 teenagers what is the probability at most 3 teenagers will have tattoos?
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document.write( "On your TI-84\r\n" );
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document.write( "Press 2ND VARS ALPHA APPS\r\n" );
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document.write( "You'll see this:\r\n" );
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document.write( "          binomcdf\r\n" );
document.write( "trials:\r\n" );
document.write( "p:\r\n" );
document.write( "x value:\r\n" );
document.write( "Paste\r\n" );
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document.write( "Make that screen read:\r\n" );
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document.write( "          binomcdf\r\n" );
document.write( "trials:30\r\n" );
document.write( "p:.04\r\n" );
document.write( "x value:3\r\n" );
document.write( "Paste\r\n" );
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document.write( "Scroll down to Paste\r\n" );
document.write( "Press ENTER \r\n" );
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document.write( "You'll see this:\r\n" );
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document.write( "binomcdf(30,.04,\r\n" );
document.write( "3)\r\n" );
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document.write( "Press ENTER again\r\n" );
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document.write( "You'll see\r\n" );
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document.write( "     .9694071153\r\n" );
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document.write( "That's the answer.  \r\n" );
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document.write( "[Note: If you have an old version of TI-84, you have to\r\n" );
document.write( "make it read:  binomcdf(30,.04,3)  then press ENTER]\r\n" );
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document.write( "Edwin
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