Twice the number of letters Elida has is 2*5=<<2*5=10>>10
2 less than twice the number of letters Elida has is 10-2=8
The total number of letter in both names is 8+5=<<8+5=13>>13
The average number of letters in the name Elida and Adrianna is 13/2=<<13/2=6.5>>6.5
10 times the average number of letters in both names is 10*6.5 = <<10*6.5=65>>65
#### 65