Carlos has four notes in his wallet: $5, $10, $20 and $50. He takes out two notes at random. a There are six possible pairs of notes. List them.

b Find the probability that:

i one of the notes is $5 ii the total value of the notes is more than $50.

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio