There are 20 packets of oats. If one packet weighs 100 grams, then what is the weight of 20 packets?
There are 500 packets in a large box and each packet contains 4 electronic devices in it. On testing, at the time of packing, it was noted that there are some faulty pieces in the packets. The data is as below:
If one packet is drawn from the box, what is the probability that all the four devices in the packet are without any fault?