top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

What is the probability that you pass on the 2nd time?

+1 vote
327 views

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

What is the probability that you pass on the 2nd time?

posted Mar 2, 2015 by Anamika

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

1 Answer

0 votes

It means he has failed 1st time
So
0.4 * 0.8 = 0.32
Answer is 32%

answer Mar 4, 2015 by Jaspalsingh Parmar



Similar Puzzles
0 votes
If you toss a coin ten times and it lands heads up every time, what is the probability that it will land heads..........

If you toss a coin ten times and it lands heads up every time, what is the probability that it will land heads up if you toss it again?

0 votes
A fair coin is tossed until a head comes up for first time. What is the probability of this happening on an odd tosses?

A fair coin is tossed until a head comes up for the first time. What is the probability of this happening on an odd number tosses?

+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.

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
A coin is randomly thrown on an infinite square grid. What is the probability that coin does not touch the grid lines?

A coin is randomly thrown on an infinite square grid. What is the probability that the coin does not touch the grid lines?
Diameter of coin : 1cm
Width of square grid : 2cm

0 votes
Three points are selected at random on a sphere's surface. What is the probability that they all lie in same hemisphere?

Three points are selected at random on a sphere's surface. What is the probability that they all lie in the same hemisphere?
Assume that the great circle, bordering a hemisphere, is part of the hemisphere.

...