0 votes 0 votes The standard deviation of linear dimensions $P$ and $Q$ are $3 \mu$ m and $4 \mu$ m, respectively. When assembled, the standard deviation (in $\mu$ m) of the resulting linear dimension $(P+Q)$ is _________. Probability and Statistics gateme-2017-set2 numerical-answers probability-and-statistics mode-and-standard-deviation + – Arjun asked Feb 26, 2017 • edited Mar 5, 2021 by Lakshman Bhaiya ♦Arjun 28.5k points answer See all 0 reply