:-

Number of possible outcomes is 36

Number of outcomes that yield sum of 11 is two____(5,6) and (6,5)

P ( sum of 11 ) = 2/36 = 1/18

Each die has six numbers from 1 to 6.

Total number of combinations = 6² = 36

Combinations to get 11: (5,6) and (6,5)

Number of combination to get 11 = 2

Percentage of getting 11

= (2/36) × 100%

= (50/9)%

≈ 5.56% (to 3 sig. fig.)

11 = 5 + 6

P(5) = ¹⁄₆ 

P(6) = ¹⁄₆

P(11) = P (5) AND P(6) = ¹⁄₆ • ¹⁄₆ = ¹⁄₃₆..............ANS

2 in 36 (17:1) ....................

There are two outcomes (6-5 and 5-6) out of 36 total for a probability of 2/36 = 1/18.  As a percentage. that's about 5.56% (5.555... precisely).