document.write( "Question 991291: A game of chance is played by selecting 4 numbers out of 20.
\n" ); document.write( "The numbers 1 to 20 are then drawn without replacements. You win the game only if you selected all four numbers that are drawn.\r
\n" ); document.write( "\n" ); document.write( "What is the chance you will win? Complete the answer in scientific notation correct to one significant figure by entering the missing index (n).
\n" ); document.write( "\"+2+%2A+10%5En+\"\r
\n" ); document.write( "\n" ); document.write( "Please show working.\r
\n" ); document.write( "\n" ); document.write( "Ok so I tried doing it.
\n" ); document.write( "\"+1%2F20+%2A+1%2F19+%2A+1%2F18+%2A+1%2F17+\"
\n" ); document.write( " = 8.6 * 10^-6
\n" ); document.write( "not the 2 times 10 to the something
\n" ); document.write( "

Algebra.Com's Answer #611187 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Your logic is sound with how you get the probability.
\n" ); document.write( "The question they're asking is, \"Find n so that \"2%2A10%5En=1%2F%2820%2A19%2A18%2A17%29\"\"
\n" ); document.write( "\"10%5En=1%2F%2840%2A19%2A18%2A17%29\"
\n" ); document.write( "\"n=log%28%281%2F%2840%2A19%2A18%2A17%29%29%29\"
\n" ); document.write( "\"n=-5.367\"
\n" ); document.write( "To one significant figure,
\n" ); document.write( "\"n=-5\"
\n" ); document.write( "
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