Question

Two balls is selected at random from the bag contains 2 white, 5 black and 7 green balls. What is the probability that it is a (i) white ball (ii) at least one green ball.
Explained with solution​

Answer 1

Answer:

if two Baal's are selected then do it this anawer

Answer 2

Question :-

• Two balls is selected at random from the bag contains 2 white, 5 black and 7 green balls. What is the probability that it is a (i) white ball (ii) at least one green ball.

Answer :-

(i) Probability of getting a white ball :-

$\boxed {\sf {Probability \; = \dfrac {Favourable \; outcomes }{ total \; outcomes}}}$

Here,

• Favourable outcomes = 2
• Total outcomes = 2 + 5 + 7 = 14

$\sf{ Probability \; of \; getting \; white \: ball \; = \dfrac {2}{14} = \dfrac{ 1}{7} }$

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(ii) Probability of getting Atleast one green ball :

• Favourable outcomes = 7
• Total outcomes = 14

$\sf {Probability \; of \;getting \;Atleast\; one \; green \; ball \; = \dfrac {7}{14 } = \dfrac {1}{2} }$