35*/*per hour

Usually replies in 4 hours

Statistics, Probability
| 10+ other subjects

45*/*per hour

Usually replies in 3 hours

Statistics, Probability
| 10+ other subjects

70*/*per hour

Usually replies in 27 minutes

Statistics, Probability
| 10+ other subjects

50*/*per hour

Usually replies in 8 minutes

Probability
| 10+ other subjects