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 optioin 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 of readings of student , `A = (3.01 +2.99)/(2) = 3.00`
Average of readings of students `B = (3.05 + 2.95)/(2) = 3.00`
Correct reading = 3.00
For both the students, average value is close to the correct value . Hence , reading of both are accurate .
Readingg of student A are close to each other (differ only by 0.02) and also close to the correct reading hence , readings of A are precise also. But readings of B are not close to each other (differ by 0.1) and hence are not precise.