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Numerical Ability
Probability
Thangam and Pandiyamma go for an interview for two vacancies. The probability for the selection of Thangam is 1/3 and whereas the probability for the selection of Pandiyamma is 1/5. What is the probability that none of them are selected?
A. 3/5
B. 7/12
C. 8/15
D. 1/5
Read Solution (Total 13)
-
- Answer: c
Probability of thangam being selected= 1/3 and him not being selected = 1-1/3=2/3
Probability of pandiyamma being selected=1/5 and him not being selected= 1-1/5=4/5
Probability that both are not selected = 2/3*4/5=8/15 - 8 years agoHelpfull: Yes(22) No(1)
- c-2/3*4/5=8/15
- 8 years agoHelpfull: Yes(2) No(1)
- 8/15
prob of thangam not selected is 1-1/3
prob of praduman not selected is 1-1/5
so prob of not selecting both(2/3*4/5)=8/15 - 5 years agoHelpfull: Yes(1) No(0)
- 1-1/3==2/3
1-1/5==4/5
(2/3)*(4/5)==8/15 - 8 years agoHelpfull: Yes(0) No(0)
- Ans 8/15
the probability of thangam not selecting is 2/3 and the probability of thangam not selecting is 4/5
let the probability be (2/3)+(4/5)=8/15 - 8 years agoHelpfull: Yes(0) No(4)
- answer is 8/15
- 7 years agoHelpfull: Yes(0) No(0)
- 2/3*4/5=8/15
- 7 years agoHelpfull: Yes(0) No(1)
- t=1/3;p=1/5ans=8/15
- 7 years agoHelpfull: Yes(0) No(1)
- p(t)=1/3
p(p)=1/5 p(not selected t)=1-1/3=2/3
p(not selected t)=1-1/5=4/5
p(none selected)=2/3*4/5=8/15 - 6 years agoHelpfull: Yes(0) No(0)
- answer is (c) 8/15
- 5 years agoHelpfull: Yes(0) No(0)
- 8/15
2/3*4/5=8/15 - 5 years agoHelpfull: Yes(0) No(0)
- probablity of thangam and pandiyamma not getting selcted is
1-1/3=2/3 & 1-1/5=4/5
given that no one should get selected (thangam and pandiyamma )
now,
2/3x4/5=8/15
multiplication is done because and is used in bracket. - 5 years agoHelpfull: Yes(0) No(0)
- chance of not selection = 1- chance of selection
so that Thangam not being selected = 1-1/3=2/3
Pandiyamma not being selected= 1-1/5=4/5
Probability that both are not selected = 2/3*4/5=8/15 - 5 years agoHelpfull: Yes(0) No(0)
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