Question
I. 63x2 + 148x + 77 = 0 II. 21y2
+ 89y + 88 = 0 In the following questions, two equations numbered I and II are given. You have to solve both questions and give answer among the following options.Solution
I. 63x2 + 148x + 77 = 0 63x2 + 49x + 99x + 77 = 0 7x(9x + 7) + 11(9x + 7) = 0 (7x + 11)(9x + 7)= 0 x = -11/7, -7/9 II. 21y2 + 89y + 88 = 0 21y2 + 56y + 33y + 88 = 0 7y( 3y + 8) + 11(3y + 8) = 0 (7y + 11) (3y + 8) = 0 y = -11/7 , - 8/3 So x ≥ y
Roger Federer gets a chance of 60% to win 1st set of tennis and Andy Murray gets a chance of 55% to win 2nd set of tennis. In what Percent of cases are ...
A is trying to break a bulb by throwing balls at it. If he hits the bulb 3 times in every 5 throws and bulb breaks 3 times out of 12 hits, then find the...
A box contains 6 red, 4 blue, 2 green and 4 yellow pens. If four pens are picked at random, what is the probability that one is green, two are blue and ...
What is the probability that the cards drawn contains 1 red card, 1 purple card and 1 yellow card?
Ajith engages in a game where he simultaneously tosses three coins and rolls a pair of dice. To win, he must achieve two outcomes: all three coins must ...
- Find the probability of selecting a number card (2 to 10) from a deck of well shuffled cards.
A bag contains 5 red balls, 4 blue balls, and 3 green balls. If three balls are drawn randomly, what is the probability that all three balls are of diff...
A bag contains 12 black and 14 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
- If 5 coins are tossed at a time what's the probability of getting exactly one head?
A poly-bag contains (3a - 4) red, (2a - 3) white, and (a - 1) black rubber bands. Two rubber bands are drawn randomly from the bag, and the probability ...
Relevant for Exams:
