A computer has a single cache (off-chip) with a 3 ns hit time and a 95% hit rate. Main memory has a 50 ns access time. If we add an on-chip cache with a 0.6 ns hit time and a 98% hit rate, the computer's effective access time:

A computer has a single cache (off-chip) with a 3 ns hit time and a 95

1.	A computer has a single cache (off-chip) with a 3 ns hit time and a 95% hit rate. Main memory has a 50 ns access time. If we add an on-chip cache with a 0.6 ns hit time and a 98% hit rate, the computer's effective access time:
A.	2.8 ns
B.	5.5 ns
C.	0.7 ns
D.	None of these
Answer» D. None of these