COA:- Average stalls per instruction

Question

What will be L1 miss rate? I think it is 80/3600 ,but then answer did not match. But if i take 80/2000,then it matches with the given answer

Comments

yes, i also think so..

the correct answer should be $\frac{40*30+40*230}{2000}$ = 5.2

Answer 1

(#of misses in L1/inst * Hit time L2)

+ (# of misses in L2/inst * miss penalty of L2)

((80*1.8)/2000)*30 +  ((40*1.8)/2000)*200

= 2.16 + 7.20

= 9.36