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# Archive | Probability

## Challenging GMAT Math Practice Questions

Here are fifteen challenging questions for GMAT math practice with explanations. Can you keep the GMAT Quant pace, doing these in under 90 seconds each?

## Matemática GMAT: a Questão de “Pelo Menos” de Probabilidade

Nós cobrimos as regras de “e”, assim como as regras de “ou” em probabilidade. Hoje nós vamos dar uma olhada nas questões de “pelo menos” em probabilidade, para a preparação para o GMAT.

## Matemáticas GMAT: las preguntas de probabilidad con “al menos”

Ya estudiamos las reglas de la probabilidad con “y” y con “o”. Hoy veremos preguntas de probabilidad con “al menos” para practicar para el GMAT.

## Matemáticas GMAT: ¿cómo se encuentra la altura de un triángulo?

¿No sabes calcular la altura de los triángulos? ¡Nuestro experto en el GMAT, Mike, te enseña a encontrarla rápido!

## GMAT Tuesdays – Probability and Counting

Today we learn more about probability and counting. Probability questions involving counting are really just multi-step counting problems. Watch the video to learn more. And if you want even more practice, click here: GMAT Probability and Counting Techniques This week’s board:

In the following probability problems, problems #1-3 function as a set, problems #4-5 are another set, and problems #6-7 are yet another set.  The scenarios are all similar in a set, and the answer choices for those problems in the same set are the same.  What is going on there?  Do all questions in the […]

## GMAT Data Sufficiency Practice Questions on Probability

First off, some of my previous blogs that may be relevant: 1) Data Sufficiency Tips 2) Probability Rules 3) The probability of the “at least” scenario 4) Probability problems involving counting Here are eight practice questions.  Solutions will appear at the end of the article. 1) In nine independent trials, what is the probability that […]

## GMAT Probability Questions

Here is a set of 14 GMAT probability questions, all in the Problem Solving style on the test, collected from a series of blog articles.  Answers and links to explanations to these these GMAT probability problems are at the end of set. —————————————————————————————————————————————— The scenario below is relevant to questions #1-#3. There are two sets […]

## Geometric Probability on the GMAT

In the first three articles in this series on GMAT probability questions, I discussed the AND and OR probability rules,  “at least” probability questions, and probability questions that involve counting.  This post covers relatively rare kind of probability question not covered in the first three posts: geometric probability questions.  First, a few challenging practice GMAT […]

## GMAT Probability and Counting Techniques

This is the third in a series of probability articles for the GMAT Quantitative Section.  In the first, I discussed the “AND” and “OR” rules for probability.  In the second, I discussed the “complement rule” and how to use this to solve “at least” problems in probability.  For a warm-up, here are some challenging GMAT […]