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Quantitative Aptitude

Quantitative Aptitude: Probability Questions

Quantitative Aptitude: Probability Questions

Quantitative Aptitude, Study Kit, Uncategorized, What's Hot
Quantitative Aptitude: Probability Questions   Probability Questions for Bank PO Exams – SBI PO, IBPS PO, NIACL, NICL, BoB PO, and other exams Three cards are drawn at random from a well-shuffled deck of cards. What is the probability of drawing a king, a Queen, and a jack? A) 16/5525 B) 64/5225 C) 16/225 D) 4/525 E) None Option A Solution:  There are 4 Kings, 4 Queens and 4 Jacks in a pack of cards. Probability =(4C1*4C1*4C1)/52C3 (4*4*4)/(52*51*50/1*2*3)= 16/5525 Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even ? A) 1/2 B) 3/4 C) 7/4 D) 3/8 E) None Option B Solution:  Two dice thrown n(s)= 6*6 = 36 Two no getting product even is = [(1,2),(1,4),(1,6),(2,1),(2,2),(2,3),(2,4),(2,5),(2,6
Pipes and Cistern

Pipes and Cistern

Quantitative Aptitude, Study Kit, Uncategorized, What's Hot
Important Concepts and Formulas - Pipes and Cistern Inlet is a pipe connected with a tank or cistern or reservoir. It is used to fill the tank. Outlet is a pipe connected with a tank or cistern or reservoir. It is used to empty the tank. If a pipe can fill a tank in x hours, part of the tank filled in 1 hour =1/xIf a pipe can empty a tank in y hours, part of the tank emptied in 1 hour =1/y If a pipe can fill a tank in xx hours and another pipe can fill it in yy hours, then both the pipes together can fill the tank in xy/(x+y) hours. Suppose a pipe can fill a tank in x hours and another pipe can empty the full tank in y hours. We can examine two cases here. If x<y net part filled in 1 hour =1/x–1/y If y<x net part emptied in 1 hour =1/y–1/x