Answer:
7⁄145 = 4.8%
Step-by-step explanation:
P(both students walk) = 7⁄30 · 6⁄29 = 7/145
Hence probability is 7/145 if both student walks
What is conditional Probability?
An occurrence could be described using conditional probability as follows:
It's pouring outside, and the chance of rain is 0.3 (30%) today.
The probability of having to go outside is 0.5 in Event B. (50 percent ).
A conditional probability considers the relationship between these two events, such as the likelihood that it will rain and that you will need to go outside.
How to solve?
Given that 7 student out of 30 come to school by waking hence 7/30=0.233
Also the condition says 2 students are chosen of 30 =2/30
P(both students walk) =P(A/B) [tex]\frac{^7C2}{^30C2} =\frac{\frac{7*6}{2} }{\frac{30*29}{2} } =\frac{7}{29*5}[/tex]
=7/145
where P(A)=2 student chosen at random=2/30 , P(B)= both student walk=2/7
Hence probability is 7/145 if both student walks
Learn more about probability https://brainly.com/question/25870256
#SPJ2
