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pickupchik [31]
3 years ago
7

Help me please will mark you as brainliest

Mathematics
1 answer:
GalinKa [24]3 years ago
4 0
B because it is moved but doesn’t change size
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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}

= 0.51

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

8 0
2 years ago
Pizza house offers 22 different​ salads, 77 different kinds of​ pizza, and 55 different desserts. how many different three cours
daser333 [38]
22x77x55=93,170 different possibilities
8 0
3 years ago
Read 2 more answers
What is the value of tan A?
Fiesta28 [93]
Check the picture below.

4 0
3 years ago
Find the surface area of a pentagon-based pyramid with slant height of 11 m.
Ronch [10]

Answer:

108.75 square meter.

Step-by-step explanation:

<h3>Surface area of pentagon based pyramid:</h3>

   \sf \boxed{\text{\bf Surface area of pentagonal pyramid = $ \bf \dfrac{5}{2}*b*(a + s)$}}

  Here,  b is the base length of the pyramid. b = 3 m

              a is the apothem of the pyramid. a = 3.5 m

              s is the slant height of the pyramid. s = 11 m

     \sf Surface \ area = \dfrac{5}{2}*3*(11 + 3.5)

                         \sf = \dfrac{5}{2}*3*14.5\\\\     = 108.75 \ m^2

5 0
1 year ago
SIMPLIFY THE EXPRESSION
DIA [1.3K]

Answer:2\sqrt(5)+9\sqrt(7)

Step-by-step explanation:

2\sqrt(20)-3\sqrt(7)=4\sqrt(5)-3\sqrt(7)

4\sqrt(5)-3\sqrt(7)-2\sqrt(5)=2\sqrt(5)-3\sqrt(7)

2\sqrt(5)-3\sqrt(7)+4\sqrt(63)=2\sqrt(5)+9\sqrt(7)

5 0
3 years ago
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