Question

# Which expression computes a pseudorandom integer between -10 and 10 using rand() from cstdlib? A. (rand(...

Which expression computes a pseudorandom integer between -10 and 10 using rand()
from cstdlib?
A. (rand( ) % 20) - 10
B. (rand( ) % 21) - 10
C. (rand( ) % 22) - 10
D. (rand( ) % 20) - 11
E. (rand( ) % 21) – 11

```rand() % 21 generates a random number between 0 and 20
so, (rand() % 21) - 10 generates a random number between 0-10 and 20-10 = -10 to 10

Answer: B. (rand() % 21) - 10```

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