The Total solution for NCERT class 6-12
Here, the first numberis 11, which divided by 4 leave remainder 3 between 10 and 300.Last term before 300 is 299, which divided by 4 leave remainder 3.11, 15, 19, 23, …, 299Here, first term (a) = 11,common difference (d) = 15 – 11 = 4nth term, an = a + (n – 1 ) d = l [last term]=> 299 = 11 + (n – 1) 4=> 299 – 11 = (n – 1) 4=> 4(n – 1) = 288=> (n – 1) = 72n = 73