If a fair coin is tossed four times, what is the probabil...
If a fair coin is tossed four times, what is the probability of obtaining at least one head?
12
14
1316
1516
Correct answer is D
P(at least one head) = 1 - P(4 tails)
Let p=12 = probability of head and q=12 = probability of tail.
(p+q)4=p4+4p3q+6p2q2+4pq3+q4
P(4 tails) = q4=(12)4=116
P(at least one head) = 1−116=1516
Find the least value of n for which 3nC2>0,n∈R...
Find the coefficient of x2in the binomial expansion of (x+2x2)5...
The second and fourth terms of an exponential sequence (G.P) are 29 and \(\frac{8}{81}\...
Given that x2+4x+k=(x+r)2+1, find the value of k and r...
Given that X : R → R is defined by x = y+15−y , y ∈ R, find ...
Which of the following is the semi-interquartile range of a distribution? ...
If X and Y are two independent events such that P(X)=18 and \(P (X ⋃ Y) = ...