A contest consist of predicting the result win, draw or defeat of 7 football matches. A sent his entry predicting at random. The probability that his entry will contain exactly 4 correct predictions isA. `(8)/(3^(7))`B. `(16)/(3^(7))`C. `(280)/(3^(7))`D. `(560)/(3^(7))`

A contest consist of predicting the result win, draw or defeat of 7 fo

1.	A contest consist of predicting the result win, draw or defeat of 7 football matches. A sent his entry predicting at random. The probability that his entry will contain exactly 4 correct predictions isA. `(8)/(3^(7))`B. `(16)/(3^(7))`C. `(280)/(3^(7))`D. `(560)/(3^(7))`
Answer» Correct Answer - C

Five coins are tossed simultaneously. The probability that at least on head turning up, isA. `(1)/(32)`B. `(5)/(32)`C. `(7)/(16)`D. `(31)/(32)`
If the chance of a gushot hitting a target is 0.2 then the probability that at least 2 shots out of 10 will hit the target isA. `1-((4)/(5))^(10)`B. `1-7((4)/(5))^(10)`C. `1+(7)/(2) ((4)/(5))^(10)`D. none of these
IF ` X to B ( n= 20,p=0.03) and (0.97)^(20) = 0.5437` then : `P ( X ge 1)=`A. `0.5463`B. `0.6453`C. `0.4563`D. none of these
IF ` X to B (n=20,p= 0.1)` then :P `(X ge 1)=..`A. `(0.1)^(20)`B. `1-(0.1)^(20)`C. `1-(0.9)^(20)`D. `(0.9)^(20)`
IF ` X to B (n=9 ,p =0.8)`, ` then :P (X ge 6) =( 4^(7))/(5^(9))(k) ` where k=A. 109B. 110C. 111D. 112
If `X to B ( n= 10,p=0.5) ` then : `p(X ge 9)=`…A. `(10)/(1024)`B. `(1)/(1024)`C. `(11)/(1024)`D. none of these
Workers in an industry have a 10% chance of sufering from an occupational disease ,Probability that , out of 6 workers , at least 5 will catch the discease isA. `(11)/(2,00,000)`B. `(11)/( 2,000)`C. `(11) /( 200)`D. none of these
If a coin is tossed 6 times , then probability of getting 4 or more haeads isA. `(10)/(32)`B. `(11)/(32)`C. `(12)/(32)`D. `(13)/(32)`
A coin is tossed 5 times. What is the probability of getting at least 3 heads.A. `(11)/(16)`B. `(15)/(16)`C. `(13)/(16)`D. none of these
If `X and Y` are independent binomial vatiates `B(5,1/2) and B(7,1/2)` and the value of `P(X+Y=3)` isA. `(55)/(1024)`B. `(55)/(4098)`C. `(55)/(2048)`D. `(55)/(128)`