The answer is B.
Reason: Think of it this way, the bottom number of all 3 fractions are related to 12. 6*2 4*3 and 3*4..
No. 61 is an odd number not divisible
Answer: 34%.
By definition of normal distribution, ≈68% of the data is within 1 standard deviation of the mean. Therefore 68% of IQs are between 85 and 115, and half of that is on the lower end, 85 to 100.
