The arno family is planning a 14 day april vacation. the location they've chosen has an average of 10 rainy days every april. the arnos would like at least 7 days without rain. should they keep their current plan?

There are 30 days in April
10 are rainy

do a ratio to determine the number of rainy days during the vacation:

10/30 = x/14
cross multiply:
140 = 30x

x = 140 /30 = 4.7 days round up to 5 days during the vacation could rain

14 total days - 5 rainy days = 9 days without rain, so they should keep their plans