Answer:
0.006369
Step-by-step explanation:
Given that a test consists of 10 multiple choice questions, each with five possible answers, one of which is correct.
By mere guessing p = probability for a right answer = 1/5 =0.20
There are two outcomes and each question is independent of the other.
X no of questions right is Bin (10,0.20)
the probability that the student will pass the test
= prob of getting more than 60%
=
=0.006369
Answer:
<h2><em><u>x</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>3</u></em><em><u> </u></em><em><u> </u></em><em><u>&</u></em><em><u> </u></em><em><u>y</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>5</u></em></h2>Step-by-step explanation:
<h3><em><u>Given</u></em><em><u>, </u></em></h3>(x+1, 10) = (4, 2y)
<u>First</u><u> </u><u>x</u><u> </u><u>coordinate</u><u>, </u>
x + 1 = 4
=> x = 4 - 1
=> <em>x = 3 (Ans) (i)</em>
<u>Second</u><u> </u><u>y</u><u> </u><u>coordinate</u><u>, </u>
10 = 2y
=> <em>y</em><em> </em><em>=</em><em> </em><em>5</em><em> </em><em>(</em><em>Ans</em><em>)</em><em> </em><em>(</em><em>ii</em><em>)</em>