algebra

Question

Answer 1

Ans D)

The no of positive integer divisible by 17,19 is =3

"    "     "     "              "     "        " 19,23   is =2

"    "     "     "              "     "        " 17,19    is =2

The no. of positive integer only divisible by 17 is (58-2-3)=53

 "     "    "     "           "      "        "        "   19  is (52-2-3)=47

"      "       "   "             "     "      "         "    23  is =(43-2-2)=39

Total number of positive integers =146