A palindrome is a number (like 535) that is the same if the digits are written in reverse order. If a number is a three digit multiple of eleven then the probability that it is
a palindrome is

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Wrote and expression for the difference of p and 4

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents