Psc Cracker

Average = Sum of given observations/ number of observations Questions 1.If the average of 13, 15 and a is 16. Then a is ( Beat Forest Officer 2018) (13+15+a)/3=16 28+a=48 a=20 2.ഒരു കുട്ടിക്ക് 7 വിഷയങ്ങൾക്ക് കിട്ടിയ ശരാശരി മാർക്ക് 40 ആണ്. കണക്ക് ഒഴികെ ഉള്ള വിഷയങ്ങളുടെ ശരാശരി 38 ആണെങ്കിൽ കണക്കിന്റെ മാർക്ക് എത്ര ? ( Process Server - Judicial 2018 ) Sum of 6 subjects=38 x 6 = 228 Sum of 7subjects =40 x 7=280 228+Maths=280 Maths=52 3.The average age of 50 pupils in a class is 10.5. If the class teacher is included, the average increases by 0.5. Then the age of the class teacher is ( Beat Forest Officer 2018 ) Sum of 50 pupils age =10.5 x 50=525 When teacher is included sum= 525+ Class teacher age=11 x 51 Class teacher age =561-525= 36 4.The average age of 25 students in a class is 14. When we add a student in that group the average age is increased to 14.5. Find the age of the new one. ( Caretaker Male 2018 ) Sum of 25 Students = 14 x 25 = 350 When new st...