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In an examination, 20 questions of true-false type are asked. Suppose a student tosses a fair coin to determine his answer to each question. If the com falls heads, he answers "true1; if it falls tails, he answers "false1. Find the probability that he answers at least 12 questions correctly.

In an examination, 20 questions of true-false type are asked. Suppose a student tosses a fair coin to determine his answer to each question. If the com falls heads, he answers true1; if it falls tails, he answers false1. Find the probability that he answers at least 12 questions correctly.

In an examination, 20 questions of true-false type are asked. Suppose a student tosses a fair coin to determine his answer to each question. If the com falls heads, he answers "true1; if it falls tails, he answers "false1. Find the probability that he gives at least two correct answers

In a hostel 60% of the students read Hindi news paper, 40% read English news paper and 20% read both Hindi and English news papers. A student is selected at random. (a) Find the probability that she reads neither Hindi nor English news papers. (b) If she reads Hindi news paper, find the probability that she reads English news paper. (c) If she reads English news paper, find the probability that she reads Hindi news paper.

In a competitive examination, 1 mark is awarded for each correct answer while 1/2 mark is deducted for every wrong answer. Jayanti answered 120 questions and got 90 marks. How many questions did she answer correctly?

On a certain test, Radeesh earned 2 points for every correct answer and lost 1 point for every incorrect answer.If he answerred all 30 questions on the test and received a score of 51, how many questions did Radeesh answer incorrectly?

12th English Answer Key 2022 Set-A to J | English Objective Answer Key 2022 Bihar Board

A and B are two students. Their chances of solving a problem correctly are 1/3 and 1/4 , respectively If the probability of their making a common error is, 1/20 and the obtain the same answer, then the probability of their answer to be correct is

A and B are two students. Their chances of solving a problem correctly are 1/3 and 1/4 , respectively If the probability of their making a common error is, 1/20 and the obtain the same answer, then the probability of their answer to be correct is

Fig 2.35 shows the velocity-time graph for two cars A and B moving in same direction. Which car has the greater acceleration ? Give reason to your answer. Reason: Slope of straight line for car B is more than that of line A. https://haygot.s3.amazonaws.com/questions/202728_8d7544af7b20492cb472c5b5c8c57e3d.png