Question
If a,b and c are three vectors such that each one is perpendicular to the vector obtained by sum of the other two and |a|=3, |b|=4 and |c|=5, then prove that |a+b+c|=5
A speak truth in 75% of the cases, while B in 90% of the cases. in what percent of cases are they likely to contradict each other in starting the same fact
find the mean and deviation about the mean for the data in execrise 3and4. 3.13,1716,14,11,13,10,16,11,18,12,17
