NEET Foundation 2022.
Biology Foundation for Class 10.
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Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.
Number of white balls=25
Number of black balls=B
Probability of drawing a black ball is third fifths of white balls.
P(B) = 3xP(W)/5
B/(25+B)=3x25/(25+B)5
Number of black balls (B)=15