Round to the appropriate number of signi...

Round to the appropriate number of significant digits
(a) 13.214 + 234.6 +7.0350 +6.38
(b) 1247 + 134.5 + 450 + 78

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The correct Answer is:

A, B

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Assertion: A number 2.746 rounded off to three significant figures is 2.75, while the number 2.743 would be 2.74. Reason: In rounding off the uncertain digits, the preceding digit is raised by 1 if the insignificant digit to be dropped is more than 5 and is left unchanged if the latter is less than 5.

if both assertion and reason are true reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation fo assertion.

If assertion is true but reaso is false.

IF both assertion and reason are false.