in a certain examination, 10% of students who appeared for the paper in statistics got less then 30 % marks and 97% of the students got less then 62 marks. assuming the distribution to be measured ,...

in a certain examination, 10% of students who appeared for the paper in statistics got less then 30 % marks and 97% of the students got less then 62 marks. assuming the distribution to be measured , find the mean and the standard deviation of the distribution