top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Can you find out the percentage of those students who passes the first test and also passed the second test ?

0 votes
389 views

A chemistry teacher took exam of his students. Out of the total students, 25% of the students passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passes the first test and also passed the second test ?

posted Jul 4, 2014 by Ujjwal Mehra

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer (Check Answer ▼)





Similar Puzzles
+1 vote

You take a test, and 60% pass the first time and 40% fail. The second time around,80% pass the test and 20% fail. The third time, 90% pass and 10% fail.

a) What is the probability that you pass on the 2nd time?
b) What is the probability that you pass on the 3rd time?
c) What is the probability you fail?

–1 vote

There are 12 boys and 9 girls in a class. If three students are selected at random, what is the probability that 1 girl and 2 boys are selected?

0 votes

There are 4 blue and 8 yellow balls.
Two balls are selected one by one without replacement.
What is the probability that first is yellow and second is blue?

0 votes

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

+1 vote

A woman who goes to work long before sunrise every morning gets dressed in the dark.
In her sock drawer she has 9 black and 12 blue socks.
What is the probability that her first pick was a black sock but her second pick was a blue socks?

...