There are thrice as many girls as boys at a school. If 35% of the girls and 45% of the boys
have already completed their holiday project, what percentage of the learners still needs to
complete their project?
Not completed percent:
(b and girls not doee)/(b+g)
(.65g+.55b)/(b+g)
(.65g+.55*3g)/(3g+g)
g(.65+1.65)/(4g)
2.2/4=.55 or 55 percent not done
100-55=45
23% boy
IS 65% OF THE GIRLS AND 55% OF THE BOYS WHO STILL NEEDS TO COMPLETE THEIR PROJECT
To find the percentage of learners who still need to complete their project, we need to determine the number of girls and boys who have completed their project.
Let's assume there are 100 total learners (to make the calculation easier).
Given that there are thrice as many girls as boys, we can assign 25 students as boys (since the total number of students is 100, and the number of boys is 1/4th of that).
Thus, the number of girls at the school would be thrice that of boys, which is 75 (3 x 25).
Now, we can find the number of girls who have completed their project by calculating 35% of the number of girls:
35% of 75 = (35/100) x 75 = 26.25
Similarly, we can find the number of boys who have completed their project by calculating 45% of the number of boys:
45% of 25 = (45/100) x 25 = 11.25
To find the total number of learners who have completed their project, we add the number of girls and boys who have completed the project:
26.25 + 11.25 = 37.5
Now, let's determine the percentage of learners who still need to complete their project:
The total number of learners is 100 (25 boys + 75 girls). And the number of learners who have completed their project is 37.5.
To find the percentage of learners who still need to complete their project, we subtract the number of learners who have completed their project from the total number of learners:
100 - 37.5 = 62.5
Thus, 62.5% of the learners still need to complete their project.
So, the answer is 62.5%.