A company did a survey to compare the popularity of two web browsers. It was found that 75 students used browser A and 40 of tho
se students used browser B also. There were 18 students who did not use browser A but used browser B. There were 7 students who did not use either browser A or browser B.
Using a two-way table, predict the number of students who would use browser B when 300 students participate in the survey.
115
133
162
174
Using a two-way table, predict the number of students who would use browser B when 300 students participate in the survey.
115
133
162
174
2 answers:
Answer:
The correct option is D.
Step-by-step explanation:
It is given that,
The number of students who use browser A = 75.
The number of students who use both browsers A and B = 40.
The number of students who use browsers B but not A = 18.
The number of students who did not use either browser A or browser B = 7.
From the given information, we can make a two way table as shown below.
Total number of students is 100 and 58 of them use browser B.
If 300 students participate in the survey, then the number of students who use browser B is
Therefore the correct option is D.
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Answer:
First mechanic worked 20 hours and second mechanic worked 5 hours
Step-by-step explanation:
Let the number of hours the first mechanic worked =
Let the number of hours the second mechanic worked =
Therefore, we can write 2 equations and then solve them simultaneously:
Rearranging the first equation:
and substituting into the second equation to find :
Now sub into the first equation to find
Therefore, first mechanic (a) worked 20 hours and second mechanic (b) worked 5 hours