For brand A, the range is

R = 60 − 10 = 50 months

For brand B, the range is

R = 45 − 25 = 20 months

Make sure the range is given as a single number.
The range for brand A shows that 50 months separate the largest data value from the smallest data value. For brand B, 20 months separate the largest data value from the smallest data value, which is less than one-half of brand A’s range.