So first I presume that it means that 10 people have phones and that 5 of the people that have phones have social media.
So this is a logic question, so of the so we’re trying to determine how many fit the qualifications, so first is that they have to have a phone, and since this number is only 10 that means that we only have 10 students to work with for the next requirement. The next requirement is that they have to have social media, now it says that 5 of the ones with phones have social media. Thus we can conclude that 5 students have a cellphone and use social media.
