D with at most three colors represented.
Is drawing two marbles out permutation or combination.
My second approach is.
In permutation and combination problems it is very important to recognize the type of problem.
Assuming each color of marble is identical and it doesn t matter.
The next draw will have two less cards in the deck so there are now 50 options and so on.
We are going to use combinations and permutations technique to do the counting part.
A with at least 2 yellow marbles.
Video lectures to prepare quantitative aptitude for placement tests and competitive exams like mba bank exams rbi ibps ssc sbi rrb railway lic mat.
How many such picks are there of each of the following types.
B with at least 2 yellow marbles and at least 1 green marble.
However ab and ba represent only one combination because order is not important to a combination.
Let us get started playing cards.
Possibility of picking the first one yellow is frac 1 2 picking the second one yellow is frac 1 3 multiplying possibilities gives me the same result frac 1 6.
The steps below will help you determine the problem type.
There are also two types of combinations remember the order does not matter now.
Problems 2 4 are similar.
Such as lottery numbers 2 14 15 27 30 33 1.
Online aptitude preparation material with practice question bank examples solutions and explanations.
E with at least two.
Because order is important to a permutation ab and ba are considered different permutations.
That s 311 875 200 permutations.
C with all four colors represented.
You remove them from the bag one of the time without replacement.
There are 4 red marbles 3 yellow 2 green and 1 blue marble.
In this post we are going to provide a couple of probability practice questions and answers.
The third problem in which we see that there s a 1 52 chance of drawing a card on the first pick but then a 0 51 chance of drawing it again yielding a probability of 0 is a big moment for a lot of kids.
Such as coins in your pocket 5 5 5 10 10 no repetition.
Using those letters we can create two 2 letter permutations ab and ba.
Actually these are the hardest to explain so we will come back to this later.
A bag contains 10 distinguishable marbles.
Should be permutations not combinations homework statement you have a bag of 10 marbles.
In playing cards what is the probability to get exactly one pair for example 1 1 2 2 if we draw 5 cards.
Many students mistakenly approach a combination problem as a permutation and vice versa.
Drawing two aces 2 the impossibility of drawing two of the same card 3 and drawing two face cards 4.
Permutations and combinations quantitative aptitude tutorial with easy tricks tips short cuts explaining the concepts.
1 red 2 blue 3 green and 4 yellow.
There is a single combination to draw two yellow marbles and 6 possible combinations how to draw two marbles.
