Final answer:
To find out the total number of problems on the biology test, we set up an equation using the given percentage and the number of problems missed. When we solve for the Total Questions, we round the result to the nearest integer and determine that the correct answer is 255 problems in total.
Step-by-step explanation:
The subject question asks how many problems were on a biology test if a student missed 61 problems and received a grade of 24%. To solve this problem, we can use the concept of equivalent fractions and cross-multiplication. The student's correct percentage is 24%, meaning they got 24% of the questions correct. The number of problems the student missed is 61, which accounts for the remaining 76% of the test.
To determine the total number of questions on the test, we can set up the following equation:
24% = Correct Questions/Total Questions and 76% = 61/Total Questions. We can combine these into a single equation to find the Total Questions (TQ): 76/100 = 61/TQ. Cross-multiplying gives us 76*TQ = 61*100, which simplifies to TQ = (61*100)/76. Calculating this gives us the total number of questions on the test, which we round to the nearest integer.
After performing the calculation, we find that the total number of questions is approximately 254.74, which rounds to 255. Therefore, the correct answer is 255, which corresponds to option d.