Young Indian shuttler Pratap Singh has won which of the following series by defeating Denmark's Mads Christophersen in the finals by 21-15, 21-11 in Uppsala?
The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?
Who among the following has been awarded by the UNHCR Nansen Refugee Award-2017 for his crucial mediating role and efforts to help children effected by the insurgency in his country?