Shortly after being put into service, some buses manufactured by a certain company have developed cracks on the underside of the main frame. suppose a particular city has 20 of these buses, and cracks have actually appeared in eight of them. in how many ways can a sample of five buses contain exactly four with visible cracks?

answer; /// i do believe its the ; //(iroquois)they were made up of several groups who spoke a common language;

new communications technology has affected the way social movements are organized because nowadays, social movements rely on social networks and the media to get different people with a similar way of thinking in contact, and thus, get them to mobilize for a greater cause.

individuals only participate in collective action when they feel identified with it. is in this aspect that social media becomes relevant, because it guarantees communication among all individuals and organizes the social actions that are going to be carried out, i.e., the social movements.

in addition, being covered by the media is important to validate the message and make it relevant in the social agenda, as well as to reach more people who can share interests, appealing to public sympathy for their cause.

in conclusion, it is by social networks and social media that social movement is given birth; by connecting different individuals with similar ideas and organizing them to mobilize for a greater cause.