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laila [671]
3 years ago
15

I need help with this, can someone help me?

Mathematics
1 answer:
Alinara [238K]3 years ago
5 0
The answer is C cause if you rotate it the shape looks different but if it had rotational symmetry it could be rotated less than 360 degrees and still look the same
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A box contain 12 balls in which 4 are white 3 are blue and 5 are red.3 balls are drawn at random from the box.find the chance th
Anastasy [175]

Answer:

3/11

Step-by-step explanation:

From the above question, we have the following information

Total number of balls = 12

Number of white balls = 4

Number of blue balls = 3

Number of red balls = 5

We solve this question using combination formula

C(n, r) = nCr = n!/r!(n - r)!

We are told that 3 balls are drawn out at random.

The chance/probability of drawing out 3 balls = 12C3 = 12!/3! × (12 - 3)! = 12!/3! × 9!

= 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1/(3 × 2 × 1) × (9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1)

= 220 ways

The chance of selecting 3 balls at random = 220

To find the chance that all the three balls are selected,

= [Chance of selecting (white ball) × Chance of selecting(blue ball) × Chance of selecting(red balls)]/ The chance/probability of drawing out 3 balls

Chance of selecting (white ball)= 4C1

Chance of selecting(blue ball) = 3C1 Chance of selecting(red balls) = 5C1

Hence,

= [4C1 × 3C1 × 5C1]/ 220

= 60/220

= 6/22

= 3/11

The chance that all three are selected is = 3/11

4 0
3 years ago
Help!!!!!!!!!!!! !!!!!!!!!!!!
yulyashka [42]
The correct answer is y=2/3x+4 which is the last option :)
6 0
3 years ago
Read 2 more answers
Which table of ordered pairs represents a proportional relationship?
natali 33 [55]

Answer:

B

Step-by-step explanation:

Every (x,y) pair is equal to each other, thus making them proportional :)

5 0
1 year ago
I have two question 1. What is 437.04 in expanded form 2.what is 3,543,21 in expanded form
Nikitich [7]
400+30+7. +0+4                              

3,000,000+500+40+3,000+2+1




3 0
3 years ago
mike had $572.18 in his checking account. after writing a check, he had $434.68. which of the following equations could be used
Vitek1552 [10]

<u><em>$572.18 - $434.68 = $137.5, therefore $137.5 is the amount of the check.</em></u>

6 0
3 years ago
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