Among a student group 49% use Google Chrome, 20% Internet Explorer, 10% Firefox, 5% Mozilla, and the latter use Safari. What is the probability that you need to pick 7 students to find 2 students using Google Chrome? Report answer to 3 decimals.

BenoguigoliB
2021-02-01
Answered

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gotovub

Answered 2021-02-02
Author has **98** answers

Step 1

Probability of students using Google chrome$=0.49$

Probability of students using other browsers$=0.51$

Step 2

Probability that there is exactly two students using google chrome in a sample of 7 is given by

$P=\left({c}_{2}^{7}\right).\cdot {\left(0.49\right)}^{2}{\left(0.51\right)}^{7}$

$21\cdot 0.2401\cdot 0.034503$

$0.173965$

Thus,$p=0.173965$

Probability of students using Google chrome

Probability of students using other browsers

Step 2

Probability that there is exactly two students using google chrome in a sample of 7 is given by

Thus,

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