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Maslowich
3 years ago
6

The probability of picking two black marbles from a box at random without replacement is 10/91 .

Mathematics
2 answers:
sasho [114]3 years ago
8 0
The probability of the 2 events are multiplied to get the result 10/91

so we have the relation 5/14 *  x  = 10/91

where x is the probability of drawing the second black

so x =  10/91 * 14/5 =  4/13   answer
Scorpion4ik [409]3 years ago
7 0

Answer:

4/13

<em />

<em>This is the correct answer! I just took the test! Good luck!!</em>

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assuming that no questions are left unanswered, in how many ways can a six-question quiz with 4-choice multiple choice questions
AfilCa [17]

Given:

Total number of questions = 6

Choice for each question (in MCQ) = 4

Assuming that no questions are left unanswered.

To find:

The total number ways to answer the quiz, assuming that no questions are left unanswered.

Solution:

Here, Number of ways to answer each question = 4

To find the  total number ways to answer 6 MCQ, we have to have to multiply number of ways to answer each question 6 times.

Total number of ways to answer six-question quiz with 4-choice multiple choice questions is

4\times 4\times 4\times 4\times 4\times 4=4096

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mina [271]

This is basically a system of 3 linear equations with variables x, y and c.


x+y = 6...................................(1)

5x/3 + y = c .........................(2)

2y = c-4x .............................(3)


(2)-(1)

5x/3-x +y-y = c-6 => 2x/3 = c-6 => x = (3/2)(c-6)=3c/2-9 ..............(4)

(3) - 2(2)

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=> 2x/3 = -c

=> x = -(3/2)c.............................................................................................(5)


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3c/2-9 = -3c/2

=>

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Answer:

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