in a computer learning institute there are 7 computers in each room. how many rooms are there in the institute if there are 63 computers altogether?

In a computer-learning institute, there are 7 computers in each room. How many rooms are there in the institute if there are 63 computers altogether? => 8 or 4 or 10 or 9..

Each room has 10 computers in a computer-learning institute. How many rooms are there in the institute if there are 70 computers all together? => 12 or 7 or 80 or 60..

Compute: 6.7 + 0.53 + 63 => 70.03 or 72.23 or 70.23 or 69.23..

The number of personal computers sold in 10 selected show rooms of System Software Park for a particular period is 121, 326, 254, 900, 460, 1160, 85, 74, 158 and 69. Find the mean deviation. => 2875.8 or 287.58 or 356.3 or 0..

In a survey conducted, 4 out of every 7 people play computer games. If 147 people are selected at random, then find the standard deviation of the number of people playing computer games. => 36 or 63 or 6 or 84..

Compute: 21 - 14.32 => 6.58 or 6.68 or 5.68 or 7.68..

A survey of 120 families showed that at least 78 had a computer at home. Find the 99% confidence interval of the true proportion of families who own a home computer. => 64.5% < p < 65.5% or 5.38% < p < 7.62% or 53.8% < p < 76.2% or 60.6% < p < 6..

Ethan bought a computer and paid 7% sales tax on it. The total cost of the computer was $400. Find the sales tax he paid. => $33 or $38 or $48 or $28..

Quincy spends 8 hours on computer every day. Find how long Quincy needs to spend on the computer further, if she has already spent 4 hours on a particular day. => 5 or 6 or 7 or 4..

The mean time a student spends on a computer is 4 hours per day. Assume the standard deviation is 0.7 hour. Find the percentage of students who spend more than 4.3 hours on the computer. Assume the variable is normally distributed. => 66.56% or 88.44% or 33.36% or 16.5..