CBSE Class 10 Mathematics Arithmetic Progressions VBQs

Question. If an AP has a1 = 1, an = 20 and Sn = 399, then the value of n is (a) 20 (b) 32 (c) 38 (d) 40 Answer : C Question. A man receives Rs. 60 for the first week and Rs. 3 more each week than the preceding week. How much does he earn by the 20th week? (a) Rs.…