ability that at least one of the events occur is mutually independent events and that P(A) = 0.3, P(B) = 0.2, P(C) = 0.4. a. 0.336 b.0.664 c. 0.024 d. 0.976 e. None d. 24 e. None such that 4. A box contains 3 red balls and 5 black balls. Balls are drawn randomly one at a time with replacement from the box. The probability that the third red ball is the seventh ball drawn is. a. 0.169 b.0.282 c. 0.179 d. 0.121 e. None 5. A box contains 20 balls, 13 of them are red and the rest are blur without replacement. The probability of gettin
ability that at least one of the events occur is mutually independent events and that P(A) = 0.3, P(B) = 0.2, P(C) = 0.4. a. 0.336 b.0.664 c. 0.024 d. 0.976 e. None d. 24 e. None such that 4. A box contains 3 red balls and 5 black balls. Balls are drawn randomly one at a time with replacement from the box. The probability that the third red ball is the seventh ball drawn is. a. 0.169 b.0.282 c. 0.179 d. 0.121 e. None 5. A box contains 20 balls, 13 of them are red and the rest are blur without replacement. The probability of gettin
Transcribed Image Text:2. How many different four-digit numbers can be formed from the digits 1,2,3,4,5,6,7 such that
the first digit 3 or 6 also you cannot repeat the digit
a. 240
b.48
c. 120
P(A)
3. If A, B and C are mutually independent events and that P(A) = 0.3, P(B) = 0.2, P(C) = 0.4.
The probability that at least one of the events occur is
a. 0.336
b.0.664
c. 0.024
a. 0.4
4. A box contains 3 red balls and 5 black balls. Balls are drawn randomly one at a time with
replacement from the box. The probability that the third red ball is the seventh ball drawn is.
a. 0.169
b.0.282
c. 0.179
d. 0.121
e. None
5. A box contains 20 balls, 13 of them are red and the rest are blue. Three balls are drawn randomly
without replacement. The probability of getting at least 1 blue ball is.
a) 0.749
b) 0.251
c) 0.479
d) 0521
b. 0.7
c. 0.9
6. The moment generating function of a random variable X M(t) = 0.5 +0.2e+0.2e³ +0.1e³t
Then P(-1.5<X<3.4)=
d. e-1
7. If the random variable X has a chi-square distribution with degrees of freedom r, and
if E(SX+3)=33. find var (X)
a. 3.46
b.12
d. 24
c. 36
d. 0.976
d. 6
ve that X has an exponential distribution. If Var (4-4-
20
b.0
0.5
e. None
e. None
8. Let X have a negative binomial distribution with rand P=0.6. If the mean of X is 5 then requal
b. 0.83
a. 1.8
c. 3
d.9
e. None
=20
e) none
e. None
e. None
