Qualification > Math
S1 and S2 DOUBTS HERE!!!!
iluvme:
i. Is it 4/6?
Doing probability maybe after 2 years. :)
ashwinkandel:
For both problems, answers are given as 1/5 i took out 2/7 for both.
iluvme:
--- Quote from: ashwinkandel on October 07, 2011, 04:46:10 pm ---For both problems, answers are given as 1/5 i took out 2/7 for both.
--- End quote ---
Sorry maybe someone else would answer.
But why 2/7?
ashwinkandel:
No. of selections with no O's=4c3=4
No. of selections with one O= 4C2=6
No. of selections with two O's=4C1=4
Total Selections=6+4+4=14
P(Does not contain letter O)=4/14=2/7
P(Contains both the letters O)=4/14=2/7
This is how i did but the answers given were 1/5. I think my solution is right but want to confirm it.
~ Miss Relina ~:
attached Q4 part (b0
and Q5 plz ??? :'( :'(
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