Instructions

For the following questions answer them individually

Question 141

If the mean of the following distribution is 50. then the ratio of the missing frequencies $$f_1$$ and $$f_2$$ is

Question 143

The mode of the following distribution of marks obtained by a group of students is approximately

Question 144

The mean of the numbers a, b, 8, 5, 10 is 6 and their variance is 6.80. Then the difference between a and b is

Question 146

The rank correlation coefficient between two characteristics X and Y of a group is found to be 0.9. If the sum of the squares of the differences in their ranks is given to be 56, then the number of individuals in that group is

Question 147

The probability that a flight arrives on time is 0.7 and the probability that a flight departs on time is 0.8. The probability that a flight neither arrives on time nor departs on time is 0.15. Then the probability that flight arrives on time and departs on time is

Question 148

Bag B1 contains 4 white and 2 black balls. Bag B2 contains 3 white and 4 black balls. A bag is drawn at random and a ball is chosen at random from it. Then the probability that the ball drawn is white, is

Question 149

In a construction company the probability that the workers go on strike is 0.65 and the probability that a construction job will be completed on time if there is no strike is 0.80. If the probability that the construction job is completed on time even if there is strike is

0.32, then the probability that the construction job is completed on time is

Question 150

A bag contains 4 red and 5 black balls. Another bag contains 3 red and 6 black balls. One ball is drawn from the first bag and two balls are drawn from the second bag at random. The probability that out of the three balls. two are black and one is red is

Linear Equations
Inequalities
Quadratic Equations
Averages, Ratios & Proportions
Profit & Loss
Number Systems
Time, Distance & Work
Geometry
Progressions & Series
Probability Combinatorics
Venn Diagrams
Data Sufficiency
Logarithms, Surds & Indices
Functions, Graphs & Statistics
Miscellaneous

DI Basics
DI Charts
Data Interpretation
DI Data Change Over Period
Tables With Missing Values
DI Venn Diagrams
DI Special Charts
DI Maxima & Minima
Quant-Based DI
DI Connected Sets
DI Miscellaneous
LR Arrangement
LR Selections With Conditions
LR Coins & Weights
LR Truth & Lie
LR Puzzles
LR Scheduling
LR Games & Tournaments
2D & 3-D LR
Quant-Based LR
LR Miscellaneous