Problema Solution
the average daily sale of 500 branch offices was r.s.150 thousend and the s.d. rs.15 thousend. assuming the distribution to be normal indicate how many branches have sales between:
r.s. 120 thousend and r.r. 145 thousend!
r.s.140 thousend and r.s. 165 thousend !
Answer provided by our tutors
(1)
P(120N(120So 173 are between 120 thousend and r.r. 145 thousend
(2)
P(140N(140So 294 are between 140 thousend and r.r. 165 thousend