RealiseNothing
what is that?It is Cowpea
Consider that you definately choose N, G, and E. The last two spots are filled with either R or A - RR, AA, AR. So you have 3 ways of choosing this.did you just count it or can you show working?.
Consider you only choose two of the three letters N, G, and E. The last three spots are filled with either R or A - RRA, RAA. So you have 2 ways of choosing it, but times by 3C2 since you are only choosing two out of the three letters. 2x(3C2)=6.
Consider you only choose one of the three letters N, G, and E. The last four spots are taken up by R or A - AARR. There is only one way of choosing this, but times by 3C1 since you are only choosing one out of the three letters. 1x(3C1)=3.
Hence add up all possible cases: 3+6+3 = 12.