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3 years ago

For displayed triangle,provide the following value for b.Round your answer two decimals

Mathematics

1 answer:

nydimaria [60]3 years ago

5 0

Tan 43° = 4/b
b= 4/(tan 43°)
b= 4/0.93251
b= 0.233
Weird result???. Have you omitted any further info?

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3 years ago

A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books. What is the probability

Gnesinka [82]

Answer:

Probability that one of them is mathematics and other two are either physics or history books = 0.51

Step-by-step explanation:

Given - A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books.

To find - What is the probability one of them is mathematics and other two are either physics or history books ?

Solution -

Given that,

A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books.

So,

Total number of books = 3 + 3 + 1 = 7

The student has to select 3 books

So, Total number of ways = $^{7} C_{3}$ = 35

So,

Probability that one of them is mathematics and other two are either physics or history books is -

= $\frac{^{3} C_{1}. ^{4} C_{2} }{^{7} C_{3}}$

= $\frac{(3)(6)}{35}$

= $\frac{18}{35}$

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⇒Probability that one of them is mathematics and other two are either physics or history books = 0.51

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3 years ago