Answer:8
Step-by-step explanation:
We have given test consists of 40 multiple choice questions having five options for each question.
Suppose there is one correct answer to each question
therefore probabilty of getting a correct answer on making a guess is
i.e. 1 out of 5 questions is correct
Using binomial distribution
where n=40 p=
mean of binomial distribution is np
therefore mean of no of correct answers=
=8
Answer:
option A
2/4 = 0.5
Step-by-step explanation:
Given in the questions that,
number of student in chess club = 4
P(B) = 4/10
number of student in karate club = 6
P(A) = 6/10
number of students who are both in chess and karate club = 2
P(A∩B) = 2/10
total number of students 10
Formula to use
<h3>P(A/B) = P(A∩B) / P(B)</h3><h3> = 2/10 / 4/10</h3><h3> = 2/4</h3><h3> = 1/2</h3><h3> = 0.50</h3>
It equals this graph expression. it's a little cropped, but I'm Sure you know about the y & x axis.
First, find the area of footbakk field in square yards:
sq. yd.
Next, if 1 yd = 91.44 cm, then 1 sq. yd=91.44·91.44 sq. cm=8,361.2736 sq. cm.
At last, you have that
1 sq. yd - 8,361.2736 sq. cm.
6000 sq. yd - x sq. cm.
Mathematically,
sq. cm.
Note that 1 m=100 cm and 1 sq. m=10000 sq. cm, then
50167641.6 sq. cm=5016.76416 sq. m
Answer: 5016.76416 sq. m
Answer:
8/49
Step-by-step explanation:
Given data
Sample space
4 red marbles
8 blue marbles
2 green
Sample size
4+8+2 = 14
Pr(picking a red)
Pr(red)= 4/14= 2/7
With replacement
Pr(picking a blue)
Pr(blue)= 8/14= 4/7
Hence the probability of picking a red marble, replacing the item, and then picking a blue marble
= 2/7*4/7
= 8/49