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BITSAT 2019 Math Algebra Revision Quiz 1
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Question 1
The number of real values of 'a' satisfying the equation a2 – 2a sin x + 1 = 0 is
Question 2
Sachin and Rahul attempted to solve a quadratic equation. Sachin made a mistake in writing down the constant term and ended up in roots (4, 3). Rahul made a mistake in writing down coefficient of x to get roots (3, 2). The correct roots of equation are:
Question 3
The roots of the equation (b – c) x2 + (c – a) x + (a – b) = 0 are
Question 4
In a class of 100 students there are 70 boys whose average marks in a subject are 75. If the average marks of the complete class is 72, then what is the average of the girls?
Question 5
Consider the data elements 4, 6, 8, 12 and 20. If each element is multiplied by 2 and subtract 3 from it. The new variance is increased to a factor of-
Question 6
A shooter can hit a given target with probability 
She keeps firing a bullet at the target until she hits it successfully three times and then she stops firing. The probability that she fires exactly six bullets lies in the interval
She keeps firing a bullet at the target until she hits it successfully three times and then she stops firing. The probability that she fires exactly six bullets lies in the interval Question 7
Suppose that 90% of people are right handed. What is the probability that at least 2 of a random sample of 10 people are right-handed?
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Jul 10JEE & BITSAT
