1. If A and B are disjoint sets then P(A B)=…………
P(A)
2. If B is a subset of A then P(A/B)= 1
True
3. P(AC/B)=1 - P(A/B)
True
4. If A and B be events with P(A)=1/3. P(B)=1/4 and P(A intersection b)=1/6, then P(A
U B) = _____________.
5/12
5. P(A/B) = P(A n b)/P(B), where _______.
P(B) > 0
6. Total degree of a graph G is ______.
2(Number of edges of G)
7. Let E(X2
)=6, u2=2, then standard deviation is ______.
2
8. If A and B be events with P(A)=1/3. P(B)=1/4 and P(A intersection b)=1/6, then
P(A/B) = _________
2/3
9. A closed walk is the walk that starts and ends at the same vertax
True
10. Total degree of G is an odd number
False
11. If X and Y are random variable, then E(aX) is equal to
aE(X)
12. A simple graph is a graph that does not have any loop.
True
13. Conditional probability of A given B is defined as ______.
P(A n B) / P(B)
14. If X and Y are independent random variables and a and b are constant, then
Var(aX+bY) is equal to
A^2 Var(X) + b^2Var(Y)
15. A random variable is also called a
Chance variable
16. If the random variable X denotes the number of heads when three distict coins are
tossed, then X assumes the value
0,1,2,3
17. If X and Y are random variables, then E (X-Y) is equal to
E(X) - E(Y)
18. A random variable is also called a Stochastic variable
True
19. Which of the followings is the probability of getting a 6 when a dice is tossed?
1/6
20. A random variable is also called a
Chance variable or stochastic varaible
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