Use the table to answer the question.
Studying Online
Girls Boys Row total
Want the option to keep studying online 10 3 13
Don’t want the option to keep studying online 5 7 12
Column total 15 10 25
Which mathematical sentence can be used to calculate the probability of selecting a student who wants the option to keep studying online or is a boy?
The answer is 52%
P(wants online option or is a boy) = (number of girls who want online option + number of boys) / total number of students = (10+3)/25 = 0.52
3/25
Start Fraction 3 over 25 End Fraction
13/25+10/25
, Start Fraction 13 over 25 End Fraction plus Start Fraction 10 over 25 End Fraction
13/25×10/25
, Start Fraction 13 over 25 End Fraction times Start Fraction 10 over 25 End Fraction
13/25+10/25−3/25
, Start Fraction 13 over 25 End Fraction plus Start Fraction 10 over 25 End Fraction minus Start Fraction 3 over 25 End Fraction
what percent?
To convert a fraction to a percent, you can multiply it by 100 and add the % symbol.
3/25 as a percent is:
3/25 × 100% = 12%
So, 3/25 is equivalent to 12%.
To calculate the probability of selecting a student who wants the option to keep studying online or is a boy, you need to find the total number of students who want the option to keep studying online or are boys, and divide it by the total number of students in the table.
Looking at the table, you can see that in the "Girls" column, 10 girls want the option to keep studying online, and in the "Boys" column, 3 boys want the option to keep studying online. To find the total number of students who want the option to keep studying online, you add these two numbers together: 10 + 3 = 13.
Now, to calculate the total number of students who are boys, you can simply look at the "Column total" for the boys, which is 10.
Finally, divide the total number of students who want the option to keep studying online or are boys (13) by the total number of students in the table (25):
P(Want online option or is a boy) = 13 / 25
So, the mathematical sentence to calculate the probability is:
P(Want online option or is a boy) = 13 / 25