I figured out that in order to make the crumb topping you need not to melt the butter but instead fork it in.
This was the first time i have ever made a pie and here's the fool proof way yours will turn out perfect.
Ingredients
pie crust
strawberries
apples
1 cup of flour
1 cup of brown sugar
where the butter says 3
cut and peel the apples and slice the strawberries and put them inside the pie crust. Make the crust by mixing the flour with the brown sugar and then fork in the butter. Then cover the fruit with the mixture. place in the oven at 375 degrees for about 35 minutes.