1
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

3 balls are drawn one after the other without replacement from an urn containing 4 red, 5 blue and 6 yellow balls. The probability of getting three different coloured balls is

A

$\frac{12}{91}$

B

$\frac{24}{91}$

C

$\frac{8}{225}$

D

$\frac{8}{75}$

2
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two balls are drawn at random from a bag containing 5 black balls and 3 white balls. If the random variable $X$ denotes the number of white balls drawn, then the mean of $X$ is

A

$\frac{1}{2}$

B

$\frac{5}{8}$

C

$\frac{3}{4}$

D

$\frac{3}{8}$

3
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the mean and variance of a binomial distribution are 4 and $\frac{4}{3}$ respectively, then $P(X=2)=$

A

$\frac{20}{243}$

B

$\frac{40}{243}$

C

$\frac{28}{729}$

D

$\frac{8}{27}$

4
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Let $A(5,-3), B(3,-2), C(-1,5)$ be three points. If $P$ is a point satisfying the condition $P A^2+2 P B^2=3 P C^2$, then a point that lies on the locus of $P$ is

A

$\left(-\frac{1}{7}, \frac{1}{2}\right)$

B

$\left(-\frac{5}{2},-2\right)$

C

$\left(-\frac{2}{21}, \frac{31}{66}\right)$

D

$\left(2, \frac{37}{22}\right)$

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