Two students performed the same experiment separately and each one of them recovered two readings of mass which are given below. Correct reading of mass is 3.0 g. On the basis of given data, mark the correct option out of the following statements.

Options

A. Results of both the students are neither accurate nor precise.
B. Results of student A are both precise and accurate.
C. Results of student B are neither precise nor accurate.
D. Results of student B are both precise and accurate

Answer

B

Explanation

Average reading of student
`A = (3.01 + 2.99)/2 = 3.00`
Average reading of student
`B = (3.05 + 2.95)/2 = 3.00`
Correct reading = 3.0
For both the students average value is same as the correct value. Hence reading of both the students are correct. But the readings of student A are close to each other (differ only by 0.02) and hence readings of student A are precise. Thus, results of student A are both precise and accurate.