<prompt> Mean hemoglobin of a group of pregnant females is found to be 10.6 gmdL with Standard deviation of 2 gmdL. 5 pregnant females in this group will have their hemoglobin level below7.31 gmdL8.6 gmdL6.6 gmdL5.0 gmdL  <response>: Mean 1SD covers 68 values; So, Hb of 68 pregnant females will lie between 10.6 2 gmdL or between 8.6-12.6gdL- So, 16 will lie below 8.6 gmdL Similarly, Mean 2SD covers 95 values; So, Hb of 95 pregnant females will lie between 10.6 22 gmdL or between 6.6-14.6 gmdL- So, 2.5 will lie below 6.6 gmdL So 5 pregnant females will have Hb below 7.31 gmdL 