Q.1. i) In five tests, one student averages 63.2 with a standard

deviation of 3.3, whereas another student averaged 78.8 with

standard deviation of 5.3. Which student is relatively more

consistent?

ii) An agricultural cooperative claims that 90% of the watermelons

shipped out are ripe and ready to eat. Find the probabilities that

among 18 watermelons shipped out

a. All 18 are ripe and ready to eat.

b. At least 16 are ripe and ready to eat.