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Mathematics: Post your doubts here!

it is from 8 to 20 so P(8<X<20)=.96 so therefore P(-12/r<Z<12/r)=.96 which is 12/r=1.96/2 therefore r = 5.84
- Ryan123
- Post #9,567
- May 20, 2013
- Forum: A-Levels

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