The question doesn’t tell us much, go straight to the statements. From statement (1) we can find the sum of the wind speeds between March 1997 and January 1998, which is 11×35=385 knots. The average of the other group of months is 11×(35−12)=253 . The difference between the two numbers is the sum of the maximum in January 1998 and February 1997. Define J as the maximum on January and F as the maximum on February, you can write the following equation: J+F=385−253=112 . J is what we’re looking for. Statement (2) can be written as J−F=8 . We have two simple equations with two unknowns, both statements together are sufficient.