Amazing Question Selection! Hands down one of the best videos on Probability
@maharajajaja
5 жыл бұрын
Loved your videos in this series! I used to be scared of probability and P&C since my school days and dreaded them more once they returned for my GMAT prep, but after your tutorials Probability is in my bag of skills now. Thanks a lot!!!
@PerfectScores
5 жыл бұрын
Thank you for your beautiful comment. You can check out more at perfectscores.org
@Miigodarodu
5 жыл бұрын
Your speaking skills make video interesting.....
@balvsmalvs5425
3 жыл бұрын
Mistake @ 9:40. It's only at the 7th question that he gets a lower than 50% chance to get all the answers straight.
@shreyshah7133
2 жыл бұрын
You just made my work way too easier, Thank you!!!!
@mateusscaletsilva5464
3 жыл бұрын
Great video. Thank you.
@danielsoto7164
5 жыл бұрын
Thank you very much. I understand perfectly with your explanation!
@anamikakapoor4745
4 жыл бұрын
This is the best video to deal with these questions , how do i get to see your private videos in probability series good sir ?
@PerfectScores
4 жыл бұрын
Please visit perfect-scores.com to access all videos.
@victormatete9926
3 жыл бұрын
Nicely explained
@aigerimsaldarova6658
3 жыл бұрын
Thank you so much! You explain very clearly :)
@ayeshahassan1579
4 жыл бұрын
Excellent stuff!
@hersonmata5397
2 жыл бұрын
Love it
@pramodmundhra2746
4 жыл бұрын
Your channel is so helpful, thankyou :)
@hughmac13
4 жыл бұрын
On the cars problem, I was curious to see what happened if the problem were set up as P(NNND) instead of P(DNNN) as it changes the first term from 3/20 to 17/20, and so on. But the result is the same. I'm new to these probability probs so I'm not sure how or if changing the order makes a difference in that type of problem (different from a coin toss, it seems to me, where each toss starts anew) but it seems not.
@rings4433
4 жыл бұрын
You're almost there. The car example does not explicitly state an order requirement for the 4 cars chosen. The formula he uses is therefore the Combination one. Order only matters in the Permutation formula. In this example, they equal one another, that's why it may seem a bit confusing at first, at least for me it did.
@adityas6373
4 жыл бұрын
In the Chicago rain question why don’t we count July 8tj as well?
@CockieMediachannelfans
3 жыл бұрын
Nowadays, those questions appear like easy questions in the simulator
@pedrosilva9648
5 жыл бұрын
You could say the difficulty level that you think about each question comparing with the common GMAT questions. Suggestion.
@abhisheksingh-zb8te
4 жыл бұрын
Is it Souvik's voice in the video?(Souvik from Gmat Club)
@filippoprincipi2132
5 жыл бұрын
Hello, and thank you for your video. In the "Chicago Rain Problem", what if the problem asked, "what is the probability that it is going to rain for 3 days in a row?" I shortened the scenarios to be 1) RRR nr nr ; 2) nr RRR nr ; 3) nr nr RRR ; 4) RRRR nr ; 5) nr RRRR ; 6 ) RRRRR . Now I can calculate the probability of each scenario and add them together: P(1) = (1/2)^5 * [5!/(3!*2!)] , which is the same as P(2) and P(3) ; P(4), P(5) = (1/2)^5 * [5!/(4!*1!)] ; P(6) = (1/2)^5 ; TOTAL PROBABILITY = SUM of P(1),P(2),P(3) ....P(6). Now, what if I want to find a shorter way to approach this? Indeed, another question may ask, what is the probability in 100 days it is going to rain 5 days in a row. Thanks in advance. Filippo
@jenyaftw
3 жыл бұрын
I don’t understand why 3!/2! why isn’t it just 3!?
@Soundsbadbro
2 жыл бұрын
3*2*1/2*1 -> everything cancels out but the 3 on the numerator
@ganeshmantri191
2 жыл бұрын
If in a set, anything repeats, you divide by its factorial. For eg. To find possible arrangements of words of 'APPLE', you would do 5!/2! since P repeats twice. In the same way, the video sample question divides by 2!
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