We introduce the exterior degree of a finite group G to be the probability for twoelements g and g' in G such that g∧g' = 1, and we shall state some results concerningthis concept. We show that if G is a non-abelian capable group, then its exterior degreeis less than 1/p, where p is the smallest prime number dividing the order of G. Finally,we give some relations between the new concept and commutativity degree, capability,and the Schur multiplier.
