Four members of a school first eleven cricket team are also members of the first fourteen rugby team How many boys play for at least one of the two teams?
Select one
a 12
b 22
C. 14
d 21

total 11+14 is 25

now 4 are common and counted twice so subtract 4 so answer is 21

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

that tool would be a compass