Loading...

Lesson: Applied Arithmetic - 30t01

In-Format Probability

[Page 30 of 36]
Task Now let's try an in-format question. Choose the correct answer and then click Continue.

If a fair coin is tossed 4 times, what's the probability that at least 3 of the 4 tosses will come up heads?

Continue

Because the individual tosses can have different outcomes, we're best off calculating the number of possible outcomes and then coming up with the number of desired outcomes by listing out the possibilities.

There are 2 possible outcomes for each toss, so after 4 tosses there are a total of 2 x 2 x 2 x 2 = 16 possible outcomes.

Let's list out all the possibilities where "at least 3 of the 4 tosses" come up heads:

H, H, H, T
H, H, T, H
H, T, H, H
T, H, H, H
H, H, H, H

So there are a total of 5 possible desired outcomes. Thus, the probability that at least 3 of the 4 tosses will come up heads is .

BackNext

Next to display next topic in the chapter.

Video Lessons and 10 Fully Explained Grand Tests

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

More for You
All in this Category

You may be interested in

Colleges in peshawar

A list of major colleges in Peshawa ...

Colleges in Sahiwal

A comprehensive list of major colle ...

UK Visa for International students

How you can get UK Visa for Interna ...

Study Abroad

How to go Abroad to study in a repu ...

Pakistan Army - Short Service Commission

Join Pakistan Army as Captain. Read ...

GRE Physics

Find what is GRE Physics and how to ...

Khyber Girls Medical College

Khyber Girls Medical College is pop ...

Medical Sciences MBBS and BDS

Admission in Medical Sciences MBBS ...